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[thirdparty/systemd.git] / src / core / service.c
1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
2
3 /***
4 This file is part of systemd.
5
6 Copyright 2010 Lennart Poettering
7
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
12
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
17
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
20 ***/
21
22 #include <errno.h>
23 #include <signal.h>
24 #include <dirent.h>
25 #include <unistd.h>
26 #include <sys/reboot.h>
27
28 #include "manager.h"
29 #include "unit.h"
30 #include "service.h"
31 #include "load-fragment.h"
32 #include "load-dropin.h"
33 #include "log.h"
34 #include "strv.h"
35 #include "unit-name.h"
36 #include "unit-printf.h"
37 #include "dbus-service.h"
38 #include "special.h"
39 #include "exit-status.h"
40 #include "def.h"
41 #include "path-util.h"
42 #include "util.h"
43 #include "utf8.h"
44 #include "env-util.h"
45 #include "fileio.h"
46 #include "bus-error.h"
47 #include "bus-util.h"
48
49 #ifdef HAVE_SYSV_COMPAT
50
51 #define DEFAULT_SYSV_TIMEOUT_USEC (5*USEC_PER_MINUTE)
52
53 typedef enum RunlevelType {
54 RUNLEVEL_UP,
55 RUNLEVEL_DOWN
56 } RunlevelType;
57
58 static const struct {
59 const char *path;
60 const char *target;
61 const RunlevelType type;
62 } rcnd_table[] = {
63 /* Standard SysV runlevels for start-up */
64 { "rc1.d", SPECIAL_RESCUE_TARGET, RUNLEVEL_UP },
65 { "rc2.d", SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
66 { "rc3.d", SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
67 { "rc4.d", SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
68 { "rc5.d", SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
69
70 /* Standard SysV runlevels for shutdown */
71 { "rc0.d", SPECIAL_POWEROFF_TARGET, RUNLEVEL_DOWN },
72 { "rc6.d", SPECIAL_REBOOT_TARGET, RUNLEVEL_DOWN }
73
74 /* Note that the order here matters, as we read the
75 directories in this order, and we want to make sure that
76 sysv_start_priority is known when we first load the
77 unit. And that value we only know from S links. Hence
78 UP must be read before DOWN */
79 };
80
81 #define RUNLEVELS_UP "12345"
82 #endif
83
84 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
85 [SERVICE_DEAD] = UNIT_INACTIVE,
86 [SERVICE_START_PRE] = UNIT_ACTIVATING,
87 [SERVICE_START] = UNIT_ACTIVATING,
88 [SERVICE_START_POST] = UNIT_ACTIVATING,
89 [SERVICE_RUNNING] = UNIT_ACTIVE,
90 [SERVICE_EXITED] = UNIT_ACTIVE,
91 [SERVICE_RELOAD] = UNIT_RELOADING,
92 [SERVICE_STOP] = UNIT_DEACTIVATING,
93 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
94 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
95 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
96 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
97 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
98 [SERVICE_FAILED] = UNIT_FAILED,
99 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
100 };
101
102 /* For Type=idle we never want to delay any other jobs, hence we
103 * consider idle jobs active as soon as we start working on them */
104 static const UnitActiveState state_translation_table_idle[_SERVICE_STATE_MAX] = {
105 [SERVICE_DEAD] = UNIT_INACTIVE,
106 [SERVICE_START_PRE] = UNIT_ACTIVE,
107 [SERVICE_START] = UNIT_ACTIVE,
108 [SERVICE_START_POST] = UNIT_ACTIVE,
109 [SERVICE_RUNNING] = UNIT_ACTIVE,
110 [SERVICE_EXITED] = UNIT_ACTIVE,
111 [SERVICE_RELOAD] = UNIT_RELOADING,
112 [SERVICE_STOP] = UNIT_DEACTIVATING,
113 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
114 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
115 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
116 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
117 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
118 [SERVICE_FAILED] = UNIT_FAILED,
119 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
120 };
121
122 static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata);
123 static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata);
124 static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata);
125
126 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f);
127
128 static void service_init(Unit *u) {
129 Service *s = SERVICE(u);
130
131 assert(u);
132 assert(u->load_state == UNIT_STUB);
133
134 s->timeout_start_usec = u->manager->default_timeout_start_usec;
135 s->timeout_stop_usec = u->manager->default_timeout_stop_usec;
136 s->restart_usec = u->manager->default_restart_usec;
137 s->type = _SERVICE_TYPE_INVALID;
138
139 #ifdef HAVE_SYSV_COMPAT
140 s->sysv_start_priority = -1;
141 s->sysv_start_priority_from_rcnd = -1;
142 #endif
143 s->socket_fd = -1;
144 s->guess_main_pid = true;
145
146 exec_context_init(&s->exec_context);
147 kill_context_init(&s->kill_context);
148 cgroup_context_init(&s->cgroup_context);
149
150 RATELIMIT_INIT(s->start_limit,
151 u->manager->default_start_limit_interval,
152 u->manager->default_start_limit_burst);
153
154 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
155 }
156
157 static void service_unwatch_control_pid(Service *s) {
158 assert(s);
159
160 if (s->control_pid <= 0)
161 return;
162
163 unit_unwatch_pid(UNIT(s), s->control_pid);
164 s->control_pid = 0;
165 }
166
167 static void service_unwatch_main_pid(Service *s) {
168 assert(s);
169
170 if (s->main_pid <= 0)
171 return;
172
173 unit_unwatch_pid(UNIT(s), s->main_pid);
174 s->main_pid = 0;
175 }
176
177 static void service_unwatch_pid_file(Service *s) {
178 if (!s->pid_file_pathspec)
179 return;
180
181 log_debug_unit(UNIT(s)->id, "Stopping watch for %s's PID file %s",
182 UNIT(s)->id, s->pid_file_pathspec->path);
183 path_spec_unwatch(s->pid_file_pathspec);
184 path_spec_done(s->pid_file_pathspec);
185 free(s->pid_file_pathspec);
186 s->pid_file_pathspec = NULL;
187 }
188
189 static int service_set_main_pid(Service *s, pid_t pid) {
190 pid_t ppid;
191
192 assert(s);
193
194 if (pid <= 1)
195 return -EINVAL;
196
197 if (pid == getpid())
198 return -EINVAL;
199
200 if (s->main_pid == pid && s->main_pid_known)
201 return 0;
202
203 if (s->main_pid != pid) {
204 service_unwatch_main_pid(s);
205 exec_status_start(&s->main_exec_status, pid);
206 }
207
208 s->main_pid = pid;
209 s->main_pid_known = true;
210
211 if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid()) {
212 log_warning_unit(UNIT(s)->id,
213 "%s: Supervising process "PID_FMT" which is not our child. We'll most likely not notice when it exits.",
214 UNIT(s)->id, pid);
215
216 s->main_pid_alien = true;
217 } else
218 s->main_pid_alien = false;
219
220 return 0;
221 }
222
223 static void service_close_socket_fd(Service *s) {
224 assert(s);
225
226 if (s->socket_fd < 0)
227 return;
228
229 close_nointr_nofail(s->socket_fd);
230 s->socket_fd = -1;
231 }
232
233 static void service_connection_unref(Service *s) {
234 assert(s);
235
236 if (!UNIT_ISSET(s->accept_socket))
237 return;
238
239 socket_connection_unref(SOCKET(UNIT_DEREF(s->accept_socket)));
240 unit_ref_unset(&s->accept_socket);
241 }
242
243 static void service_stop_watchdog(Service *s) {
244 assert(s);
245
246 s->watchdog_event_source = sd_event_source_unref(s->watchdog_event_source);
247 s->watchdog_timestamp = DUAL_TIMESTAMP_NULL;
248 }
249
250 static void service_start_watchdog(Service *s) {
251 int r;
252
253 assert(s);
254
255 if (s->watchdog_usec <= 0)
256 return;
257
258 if (s->watchdog_event_source) {
259 r = sd_event_source_set_time(s->watchdog_event_source, s->watchdog_timestamp.monotonic + s->watchdog_usec);
260 if (r < 0) {
261 log_warning_unit(UNIT(s)->id, "%s failed to reset watchdog timer: %s", UNIT(s)->id, strerror(-r));
262 return;
263 }
264
265 r = sd_event_source_set_enabled(s->watchdog_event_source, SD_EVENT_ONESHOT);
266 } else {
267 r = sd_event_add_monotonic(UNIT(s)->manager->event, s->watchdog_timestamp.monotonic + s->watchdog_usec, 0, service_dispatch_watchdog, s, &s->watchdog_event_source);
268 if (r < 0) {
269 log_warning_unit(UNIT(s)->id, "%s failed to add watchdog timer: %s", UNIT(s)->id, strerror(-r));
270 return;
271 }
272
273 /* Let's process everything else which might be a sign
274 * of living before we consider a service died. */
275 r = sd_event_source_set_priority(s->watchdog_event_source, SD_EVENT_PRIORITY_IDLE);
276 }
277
278 if (r < 0)
279 log_warning_unit(UNIT(s)->id, "%s failed to install watchdog timer: %s", UNIT(s)->id, strerror(-r));
280 }
281
282 static void service_reset_watchdog(Service *s) {
283 assert(s);
284
285 dual_timestamp_get(&s->watchdog_timestamp);
286 service_start_watchdog(s);
287 }
288
289 static void service_done(Unit *u) {
290 Service *s = SERVICE(u);
291
292 assert(s);
293
294 free(s->pid_file);
295 s->pid_file = NULL;
296
297 #ifdef HAVE_SYSV_COMPAT
298 free(s->sysv_runlevels);
299 s->sysv_runlevels = NULL;
300 #endif
301
302 free(s->status_text);
303 s->status_text = NULL;
304
305 cgroup_context_done(&s->cgroup_context);
306 exec_context_done(&s->exec_context);
307 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
308 exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
309 s->control_command = NULL;
310 s->main_command = NULL;
311
312 set_free(s->restart_ignore_status.code);
313 s->restart_ignore_status.code = NULL;
314 set_free(s->restart_ignore_status.signal);
315 s->restart_ignore_status.signal = NULL;
316
317 set_free(s->success_status.code);
318 s->success_status.code = NULL;
319 set_free(s->success_status.signal);
320 s->success_status.signal = NULL;
321
322 /* This will leak a process, but at least no memory or any of
323 * our resources */
324 service_unwatch_main_pid(s);
325 service_unwatch_control_pid(s);
326 service_unwatch_pid_file(s);
327
328 if (s->bus_name) {
329 unit_unwatch_bus_name(u, s->bus_name);
330 free(s->bus_name);
331 s->bus_name = NULL;
332 }
333
334 service_close_socket_fd(s);
335 service_connection_unref(s);
336
337 unit_ref_unset(&s->accept_socket);
338
339 service_stop_watchdog(s);
340
341 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
342 }
343
344 static int service_arm_timer(Service *s, usec_t usec) {
345 int r;
346
347 assert(s);
348
349 if (s->timer_event_source) {
350 r = sd_event_source_set_time(s->timer_event_source, now(CLOCK_MONOTONIC) + usec);
351 if (r < 0)
352 return r;
353
354 return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT);
355 }
356
357 return sd_event_add_monotonic(UNIT(s)->manager->event, now(CLOCK_MONOTONIC) + usec, 0, service_dispatch_timer, s, &s->timer_event_source);
358 }
359
360 #ifdef HAVE_SYSV_COMPAT
361 static char *sysv_translate_name(const char *name) {
362 char *r;
363
364 r = new(char, strlen(name) + sizeof(".service"));
365 if (!r)
366 return NULL;
367
368 if (endswith(name, ".sh"))
369 /* Drop .sh suffix */
370 strcpy(stpcpy(r, name) - 3, ".service");
371 else
372 /* Normal init script name */
373 strcpy(stpcpy(r, name), ".service");
374
375 return r;
376 }
377
378 static int sysv_translate_facility(const char *name, const char *filename, char **_r) {
379
380 /* We silently ignore the $ prefix here. According to the LSB
381 * spec it simply indicates whether something is a
382 * standardized name or a distribution-specific one. Since we
383 * just follow what already exists and do not introduce new
384 * uses or names we don't care who introduced a new name. */
385
386 static const char * const table[] = {
387 /* LSB defined facilities */
388 "local_fs", NULL,
389 "network", SPECIAL_NETWORK_TARGET,
390 "named", SPECIAL_NSS_LOOKUP_TARGET,
391 "portmap", SPECIAL_RPCBIND_TARGET,
392 "remote_fs", SPECIAL_REMOTE_FS_TARGET,
393 "syslog", NULL,
394 "time", SPECIAL_TIME_SYNC_TARGET,
395 };
396
397 unsigned i;
398 char *r;
399 const char *n;
400
401 assert(name);
402 assert(_r);
403
404 n = *name == '$' ? name + 1 : name;
405
406 for (i = 0; i < ELEMENTSOF(table); i += 2) {
407
408 if (!streq(table[i], n))
409 continue;
410
411 if (!table[i+1])
412 return 0;
413
414 r = strdup(table[i+1]);
415 if (!r)
416 return log_oom();
417
418 goto finish;
419 }
420
421 /* If we don't know this name, fallback heuristics to figure
422 * out whether something is a target or a service alias. */
423
424 if (*name == '$') {
425 if (!unit_prefix_is_valid(n))
426 return -EINVAL;
427
428 /* Facilities starting with $ are most likely targets */
429 r = unit_name_build(n, NULL, ".target");
430 } else if (filename && streq(name, filename))
431 /* Names equaling the file name of the services are redundant */
432 return 0;
433 else
434 /* Everything else we assume to be normal service names */
435 r = sysv_translate_name(n);
436
437 if (!r)
438 return -ENOMEM;
439
440 finish:
441 *_r = r;
442
443 return 1;
444 }
445
446 static int sysv_fix_order(Service *s) {
447 Unit *other;
448 int r;
449
450 assert(s);
451
452 if (s->sysv_start_priority < 0)
453 return 0;
454
455 /* For each pair of services where at least one lacks a LSB
456 * header, we use the start priority value to order things. */
457
458 LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_SERVICE]) {
459 Service *t;
460 UnitDependency d;
461 bool special_s, special_t;
462
463 t = SERVICE(other);
464
465 if (s == t)
466 continue;
467
468 if (UNIT(t)->load_state != UNIT_LOADED)
469 continue;
470
471 if (t->sysv_start_priority < 0)
472 continue;
473
474 /* If both units have modern headers we don't care
475 * about the priorities */
476 if ((UNIT(s)->fragment_path || s->sysv_has_lsb) &&
477 (UNIT(t)->fragment_path || t->sysv_has_lsb))
478 continue;
479
480 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
481 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
482
483 if (special_t && !special_s)
484 d = UNIT_AFTER;
485 else if (special_s && !special_t)
486 d = UNIT_BEFORE;
487 else if (t->sysv_start_priority < s->sysv_start_priority)
488 d = UNIT_AFTER;
489 else if (t->sysv_start_priority > s->sysv_start_priority)
490 d = UNIT_BEFORE;
491 else
492 continue;
493
494 /* FIXME: Maybe we should compare the name here lexicographically? */
495
496 if ((r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
497 return r;
498 }
499
500 return 0;
501 }
502
503 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
504 ExecCommand *c;
505
506 if (!(c = new0(ExecCommand, 1)))
507 return NULL;
508
509 if (!(c->path = strdup(path))) {
510 free(c);
511 return NULL;
512 }
513
514 if (!(c->argv = strv_new(path, arg1, NULL))) {
515 free(c->path);
516 free(c);
517 return NULL;
518 }
519
520 return c;
521 }
522
523 static int sysv_exec_commands(Service *s, const bool supports_reload) {
524 ExecCommand *c;
525
526 assert(s);
527 assert(s->is_sysv);
528 assert(UNIT(s)->source_path);
529
530 c = exec_command_new(UNIT(s)->source_path, "start");
531 if (!c)
532 return -ENOMEM;
533 exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
534
535 c = exec_command_new(UNIT(s)->source_path, "stop");
536 if (!c)
537 return -ENOMEM;
538 exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
539
540 if (supports_reload) {
541 c = exec_command_new(UNIT(s)->source_path, "reload");
542 if (!c)
543 return -ENOMEM;
544 exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
545 }
546
547 return 0;
548 }
549
550 static bool usage_contains_reload(const char *line) {
551 return (strcasestr(line, "{reload|") ||
552 strcasestr(line, "{reload}") ||
553 strcasestr(line, "{reload\"") ||
554 strcasestr(line, "|reload|") ||
555 strcasestr(line, "|reload}") ||
556 strcasestr(line, "|reload\""));
557 }
558
559 static int service_load_sysv_path(Service *s, const char *path) {
560 FILE *f;
561 Unit *u;
562 unsigned line = 0;
563 int r;
564 enum {
565 NORMAL,
566 DESCRIPTION,
567 LSB,
568 LSB_DESCRIPTION,
569 USAGE_CONTINUATION
570 } state = NORMAL;
571 char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
572 struct stat st;
573 bool supports_reload = false;
574
575 assert(s);
576 assert(path);
577
578 u = UNIT(s);
579
580 f = fopen(path, "re");
581 if (!f) {
582 r = errno == ENOENT ? 0 : -errno;
583 goto finish;
584 }
585
586 if (fstat(fileno(f), &st) < 0) {
587 r = -errno;
588 goto finish;
589 }
590
591 free(u->source_path);
592 u->source_path = strdup(path);
593 if (!u->source_path) {
594 r = -ENOMEM;
595 goto finish;
596 }
597 u->source_mtime = timespec_load(&st.st_mtim);
598
599 if (null_or_empty(&st)) {
600 u->load_state = UNIT_MASKED;
601 r = 0;
602 goto finish;
603 }
604
605 s->is_sysv = true;
606
607 while (!feof(f)) {
608 char l[LINE_MAX], *t;
609
610 if (!fgets(l, sizeof(l), f)) {
611 if (feof(f))
612 break;
613
614 r = -errno;
615 log_error_unit(u->id,
616 "Failed to read configuration file '%s': %s",
617 path, strerror(-r));
618 goto finish;
619 }
620
621 line++;
622
623 t = strstrip(l);
624 if (*t != '#') {
625 /* Try to figure out whether this init script supports
626 * the reload operation. This heuristic looks for
627 * "Usage" lines which include the reload option. */
628 if ( state == USAGE_CONTINUATION ||
629 (state == NORMAL && strcasestr(t, "usage"))) {
630 if (usage_contains_reload(t)) {
631 supports_reload = true;
632 state = NORMAL;
633 } else if (t[strlen(t)-1] == '\\')
634 state = USAGE_CONTINUATION;
635 else
636 state = NORMAL;
637 }
638
639 continue;
640 }
641
642 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
643 state = LSB;
644 s->sysv_has_lsb = true;
645 continue;
646 }
647
648 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
649 state = NORMAL;
650 continue;
651 }
652
653 t++;
654 t += strspn(t, WHITESPACE);
655
656 if (state == NORMAL) {
657
658 /* Try to parse Red Hat style chkconfig headers */
659
660 if (startswith_no_case(t, "chkconfig:")) {
661 int start_priority;
662 char runlevels[16], *k;
663
664 state = NORMAL;
665
666 if (sscanf(t+10, "%15s %i %*i",
667 runlevels,
668 &start_priority) != 2) {
669
670 log_warning_unit(u->id,
671 "[%s:%u] Failed to parse chkconfig line. Ignoring.",
672 path, line);
673 continue;
674 }
675
676 /* A start priority gathered from the
677 * symlink farms is preferred over the
678 * data from the LSB header. */
679 if (start_priority < 0 || start_priority > 99)
680 log_warning_unit(u->id,
681 "[%s:%u] Start priority out of range. Ignoring.",
682 path, line);
683 else
684 s->sysv_start_priority = start_priority;
685
686 char_array_0(runlevels);
687 k = delete_chars(runlevels, WHITESPACE "-");
688
689 if (k[0]) {
690 char *d;
691
692 if (!(d = strdup(k))) {
693 r = -ENOMEM;
694 goto finish;
695 }
696
697 free(s->sysv_runlevels);
698 s->sysv_runlevels = d;
699 }
700
701 } else if (startswith_no_case(t, "description:")) {
702
703 size_t k = strlen(t);
704 char *d;
705 const char *j;
706
707 if (t[k-1] == '\\') {
708 state = DESCRIPTION;
709 t[k-1] = 0;
710 }
711
712 if ((j = strstrip(t+12)) && *j) {
713 if (!(d = strdup(j))) {
714 r = -ENOMEM;
715 goto finish;
716 }
717 } else
718 d = NULL;
719
720 free(chkconfig_description);
721 chkconfig_description = d;
722
723 } else if (startswith_no_case(t, "pidfile:")) {
724
725 char *fn;
726
727 state = NORMAL;
728
729 fn = strstrip(t+8);
730 if (!path_is_absolute(fn)) {
731 log_warning_unit(u->id,
732 "[%s:%u] PID file not absolute. Ignoring.",
733 path, line);
734 continue;
735 }
736
737 if (!(fn = strdup(fn))) {
738 r = -ENOMEM;
739 goto finish;
740 }
741
742 free(s->pid_file);
743 s->pid_file = fn;
744 }
745
746 } else if (state == DESCRIPTION) {
747
748 /* Try to parse Red Hat style description
749 * continuation */
750
751 size_t k = strlen(t);
752 char *j;
753
754 if (t[k-1] == '\\')
755 t[k-1] = 0;
756 else
757 state = NORMAL;
758
759 if ((j = strstrip(t)) && *j) {
760 char *d = NULL;
761
762 if (chkconfig_description)
763 d = strjoin(chkconfig_description, " ", j, NULL);
764 else
765 d = strdup(j);
766
767 if (!d) {
768 r = -ENOMEM;
769 goto finish;
770 }
771
772 free(chkconfig_description);
773 chkconfig_description = d;
774 }
775
776 } else if (state == LSB || state == LSB_DESCRIPTION) {
777
778 if (startswith_no_case(t, "Provides:")) {
779 char *i, *w;
780 size_t z;
781
782 state = LSB;
783
784 FOREACH_WORD_QUOTED(w, z, t+9, i) {
785 char *n, *m;
786
787 if (!(n = strndup(w, z))) {
788 r = -ENOMEM;
789 goto finish;
790 }
791
792 r = sysv_translate_facility(n, basename(path), &m);
793 free(n);
794
795 if (r < 0)
796 goto finish;
797
798 if (r == 0)
799 continue;
800
801 if (unit_name_to_type(m) == UNIT_SERVICE)
802 r = unit_merge_by_name(u, m);
803 else
804 /* NB: SysV targets
805 * which are provided
806 * by a service are
807 * pulled in by the
808 * services, as an
809 * indication that the
810 * generic service is
811 * now available. This
812 * is strictly
813 * one-way. The
814 * targets do NOT pull
815 * in the SysV
816 * services! */
817 r = unit_add_two_dependencies_by_name(u, UNIT_BEFORE, UNIT_WANTS, m, NULL, true);
818
819 if (r < 0)
820 log_error_unit(u->id,
821 "[%s:%u] Failed to add LSB Provides name %s, ignoring: %s",
822 path, line, m, strerror(-r));
823
824 free(m);
825 }
826
827 } else if (startswith_no_case(t, "Required-Start:") ||
828 startswith_no_case(t, "Should-Start:") ||
829 startswith_no_case(t, "X-Start-Before:") ||
830 startswith_no_case(t, "X-Start-After:")) {
831 char *i, *w;
832 size_t z;
833
834 state = LSB;
835
836 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
837 char *n, *m;
838
839 if (!(n = strndup(w, z))) {
840 r = -ENOMEM;
841 goto finish;
842 }
843
844 r = sysv_translate_facility(n, basename(path), &m);
845 if (r < 0) {
846 log_error_unit(u->id,
847 "[%s:%u] Failed to translate LSB dependency %s, ignoring: %s",
848 path, line, n, strerror(-r));
849 free(n);
850 continue;
851 }
852
853 free(n);
854
855 if (r == 0)
856 continue;
857
858 r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
859
860 if (r < 0)
861 log_error_unit(u->id, "[%s:%u] Failed to add dependency on %s, ignoring: %s",
862 path, line, m, strerror(-r));
863
864 free(m);
865 }
866 } else if (startswith_no_case(t, "Default-Start:")) {
867 char *k, *d;
868
869 state = LSB;
870
871 k = delete_chars(t+14, WHITESPACE "-");
872
873 if (k[0] != 0) {
874 if (!(d = strdup(k))) {
875 r = -ENOMEM;
876 goto finish;
877 }
878
879 free(s->sysv_runlevels);
880 s->sysv_runlevels = d;
881 }
882
883 } else if (startswith_no_case(t, "Description:")) {
884 char *d, *j;
885
886 state = LSB_DESCRIPTION;
887
888 if ((j = strstrip(t+12)) && *j) {
889 if (!(d = strdup(j))) {
890 r = -ENOMEM;
891 goto finish;
892 }
893 } else
894 d = NULL;
895
896 free(long_description);
897 long_description = d;
898
899 } else if (startswith_no_case(t, "Short-Description:")) {
900 char *d, *j;
901
902 state = LSB;
903
904 if ((j = strstrip(t+18)) && *j) {
905 if (!(d = strdup(j))) {
906 r = -ENOMEM;
907 goto finish;
908 }
909 } else
910 d = NULL;
911
912 free(short_description);
913 short_description = d;
914
915 } else if (state == LSB_DESCRIPTION) {
916
917 if (startswith(l, "#\t") || startswith(l, "# ")) {
918 char *j;
919
920 if ((j = strstrip(t)) && *j) {
921 char *d = NULL;
922
923 if (long_description)
924 d = strjoin(long_description, " ", t, NULL);
925 else
926 d = strdup(j);
927
928 if (!d) {
929 r = -ENOMEM;
930 goto finish;
931 }
932
933 free(long_description);
934 long_description = d;
935 }
936
937 } else
938 state = LSB;
939 }
940 }
941 }
942
943 if ((r = sysv_exec_commands(s, supports_reload)) < 0)
944 goto finish;
945
946 if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
947 /* If there a runlevels configured for this service
948 * but none of the standard ones, then we assume this
949 * is some special kind of service (which might be
950 * needed for early boot) and don't create any links
951 * to it. */
952
953 UNIT(s)->default_dependencies = false;
954
955 /* Don't timeout special services during boot (like fsck) */
956 s->timeout_start_usec = 0;
957 s->timeout_stop_usec = 0;
958 } else {
959 s->timeout_start_usec = DEFAULT_SYSV_TIMEOUT_USEC;
960 s->timeout_stop_usec = DEFAULT_SYSV_TIMEOUT_USEC;
961 }
962
963 /* Special setting for all SysV services */
964 s->type = SERVICE_FORKING;
965 s->remain_after_exit = !s->pid_file;
966 s->guess_main_pid = false;
967 s->restart = SERVICE_RESTART_NO;
968 s->exec_context.ignore_sigpipe = false;
969 s->kill_context.kill_mode = KILL_PROCESS;
970
971 /* We use the long description only if
972 * no short description is set. */
973
974 if (short_description)
975 description = short_description;
976 else if (chkconfig_description)
977 description = chkconfig_description;
978 else if (long_description)
979 description = long_description;
980 else
981 description = NULL;
982
983 if (description) {
984 char *d;
985
986 if (!(d = strappend(s->sysv_has_lsb ? "LSB: " : "SYSV: ", description))) {
987 r = -ENOMEM;
988 goto finish;
989 }
990
991 u->description = d;
992 }
993
994 /* The priority that has been set in /etc/rcN.d/ hierarchies
995 * takes precedence over what is stored as default in the LSB
996 * header */
997 if (s->sysv_start_priority_from_rcnd >= 0)
998 s->sysv_start_priority = s->sysv_start_priority_from_rcnd;
999
1000 u->load_state = UNIT_LOADED;
1001 r = 0;
1002
1003 finish:
1004
1005 if (f)
1006 fclose(f);
1007
1008 free(short_description);
1009 free(long_description);
1010 free(chkconfig_description);
1011
1012 return r;
1013 }
1014
1015 static int service_load_sysv_name(Service *s, const char *name) {
1016 char **p;
1017
1018 assert(s);
1019 assert(name);
1020
1021 /* For SysV services we strip the *.sh suffixes. */
1022 if (endswith(name, ".sh.service"))
1023 return -ENOENT;
1024
1025 STRV_FOREACH(p, UNIT(s)->manager->lookup_paths.sysvinit_path) {
1026 char *path;
1027 int r;
1028
1029 path = strjoin(*p, "/", name, NULL);
1030 if (!path)
1031 return -ENOMEM;
1032
1033 assert(endswith(path, ".service"));
1034 path[strlen(path)-8] = 0;
1035
1036 r = service_load_sysv_path(s, path);
1037
1038 if (r >= 0 && UNIT(s)->load_state == UNIT_STUB) {
1039 /* Try *.sh source'able init scripts */
1040 strcat(path, ".sh");
1041 r = service_load_sysv_path(s, path);
1042 }
1043 free(path);
1044
1045 if (r < 0)
1046 return r;
1047
1048 if (UNIT(s)->load_state != UNIT_STUB)
1049 break;
1050 }
1051
1052 return 0;
1053 }
1054
1055 static int service_load_sysv(Service *s) {
1056 const char *t;
1057 Iterator i;
1058 int r;
1059
1060 assert(s);
1061
1062 /* Load service data from SysV init scripts, preferably with
1063 * LSB headers ... */
1064
1065 if (strv_isempty(UNIT(s)->manager->lookup_paths.sysvinit_path))
1066 return 0;
1067
1068 if ((t = UNIT(s)->id))
1069 if ((r = service_load_sysv_name(s, t)) < 0)
1070 return r;
1071
1072 if (UNIT(s)->load_state == UNIT_STUB)
1073 SET_FOREACH(t, UNIT(s)->names, i) {
1074 if (t == UNIT(s)->id)
1075 continue;
1076
1077 if ((r = service_load_sysv_name(s, t)) < 0)
1078 return r;
1079
1080 if (UNIT(s)->load_state != UNIT_STUB)
1081 break;
1082 }
1083
1084 return 0;
1085 }
1086 #endif
1087
1088 static int service_verify(Service *s) {
1089 assert(s);
1090
1091 if (UNIT(s)->load_state != UNIT_LOADED)
1092 return 0;
1093
1094 if (!s->exec_command[SERVICE_EXEC_START]) {
1095 log_error_unit(UNIT(s)->id, "%s lacks ExecStart setting. Refusing.", UNIT(s)->id);
1096 return -EINVAL;
1097 }
1098
1099 if (s->type != SERVICE_ONESHOT &&
1100 s->exec_command[SERVICE_EXEC_START]->command_next) {
1101 log_error_unit(UNIT(s)->id, "%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
1102 return -EINVAL;
1103 }
1104
1105 if (s->type == SERVICE_ONESHOT && s->restart != SERVICE_RESTART_NO) {
1106 log_error_unit(UNIT(s)->id, "%s has Restart setting other than no, which isn't allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
1107 return -EINVAL;
1108 }
1109
1110 if (s->type == SERVICE_DBUS && !s->bus_name) {
1111 log_error_unit(UNIT(s)->id, "%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", UNIT(s)->id);
1112 return -EINVAL;
1113 }
1114
1115 if (s->bus_name && s->type != SERVICE_DBUS)
1116 log_warning_unit(UNIT(s)->id, "%s has a D-Bus service name specified, but is not of type dbus. Ignoring.", UNIT(s)->id);
1117
1118 if (s->exec_context.pam_name && !(s->kill_context.kill_mode == KILL_CONTROL_GROUP || s->kill_context.kill_mode == KILL_MIXED)) {
1119 log_error_unit(UNIT(s)->id, "%s has PAM enabled. Kill mode must be set to 'control-group' or 'mixed'. Refusing.", UNIT(s)->id);
1120 return -EINVAL;
1121 }
1122
1123 return 0;
1124 }
1125
1126 static int service_add_default_dependencies(Service *s) {
1127 int r;
1128
1129 assert(s);
1130
1131 /* Add a number of automatic dependencies useful for the
1132 * majority of services. */
1133
1134 /* First, pull in base system */
1135 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES,
1136 SPECIAL_BASIC_TARGET, NULL, true);
1137 if (r < 0)
1138 return r;
1139
1140 /* Second, activate normal shutdown */
1141 r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS,
1142 SPECIAL_SHUTDOWN_TARGET, NULL, true);
1143 return r;
1144 }
1145
1146 static void service_fix_output(Service *s) {
1147 assert(s);
1148
1149 /* If nothing has been explicitly configured, patch default
1150 * output in. If input is socket/tty we avoid this however,
1151 * since in that case we want output to default to the same
1152 * place as we read input from. */
1153
1154 if (s->exec_context.std_error == EXEC_OUTPUT_INHERIT &&
1155 s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
1156 s->exec_context.std_input == EXEC_INPUT_NULL)
1157 s->exec_context.std_error = UNIT(s)->manager->default_std_error;
1158
1159 if (s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
1160 s->exec_context.std_input == EXEC_INPUT_NULL)
1161 s->exec_context.std_output = UNIT(s)->manager->default_std_output;
1162 }
1163
1164 static int service_load(Unit *u) {
1165 int r;
1166 Service *s = SERVICE(u);
1167
1168 assert(s);
1169
1170 /* Load a .service file */
1171 r = unit_load_fragment(u);
1172 if (r < 0)
1173 return r;
1174
1175 #ifdef HAVE_SYSV_COMPAT
1176 /* Load a classic init script as a fallback, if we couldn't find anything */
1177 if (u->load_state == UNIT_STUB) {
1178 r = service_load_sysv(s);
1179 if (r < 0)
1180 return r;
1181 }
1182 #endif
1183
1184 /* Still nothing found? Then let's give up */
1185 if (u->load_state == UNIT_STUB)
1186 return -ENOENT;
1187
1188 /* This is a new unit? Then let's add in some extras */
1189 if (u->load_state == UNIT_LOADED) {
1190
1191 /* We were able to load something, then let's add in
1192 * the dropin directories. */
1193 r = unit_load_dropin(u);
1194 if (r < 0)
1195 return r;
1196
1197 if (s->type == _SERVICE_TYPE_INVALID)
1198 s->type = s->bus_name ? SERVICE_DBUS : SERVICE_SIMPLE;
1199
1200 /* Oneshot services have disabled start timeout by default */
1201 if (s->type == SERVICE_ONESHOT && !s->start_timeout_defined)
1202 s->timeout_start_usec = 0;
1203
1204 service_fix_output(s);
1205
1206 r = unit_add_exec_dependencies(u, &s->exec_context);
1207 if (r < 0)
1208 return r;
1209
1210 r = unit_add_default_slice(u);
1211 if (r < 0)
1212 return r;
1213
1214 #ifdef HAVE_SYSV_COMPAT
1215 r = sysv_fix_order(s);
1216 if (r < 0)
1217 return r;
1218 #endif
1219
1220 if (s->bus_name) {
1221 r = unit_watch_bus_name(u, s->bus_name);
1222 if (r < 0)
1223 return r;
1224 }
1225
1226 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
1227 s->notify_access = NOTIFY_MAIN;
1228
1229 if (s->watchdog_usec > 0 && s->notify_access == NOTIFY_NONE)
1230 s->notify_access = NOTIFY_MAIN;
1231
1232 if (UNIT(s)->default_dependencies) {
1233 r = service_add_default_dependencies(s);
1234 if (r < 0)
1235 return r;
1236 }
1237
1238 r = unit_exec_context_defaults(u, &s->exec_context);
1239 if (r < 0)
1240 return r;
1241 }
1242
1243 return service_verify(s);
1244 }
1245
1246 static void service_dump(Unit *u, FILE *f, const char *prefix) {
1247
1248 ServiceExecCommand c;
1249 Service *s = SERVICE(u);
1250 const char *prefix2;
1251 _cleanup_free_ char *p2 = NULL;
1252
1253 assert(s);
1254
1255 p2 = strappend(prefix, "\t");
1256 prefix2 = p2 ? p2 : prefix;
1257
1258 fprintf(f,
1259 "%sService State: %s\n"
1260 "%sResult: %s\n"
1261 "%sReload Result: %s\n"
1262 "%sPermissionsStartOnly: %s\n"
1263 "%sRootDirectoryStartOnly: %s\n"
1264 "%sRemainAfterExit: %s\n"
1265 "%sGuessMainPID: %s\n"
1266 "%sType: %s\n"
1267 "%sRestart: %s\n"
1268 "%sNotifyAccess: %s\n",
1269 prefix, service_state_to_string(s->state),
1270 prefix, service_result_to_string(s->result),
1271 prefix, service_result_to_string(s->reload_result),
1272 prefix, yes_no(s->permissions_start_only),
1273 prefix, yes_no(s->root_directory_start_only),
1274 prefix, yes_no(s->remain_after_exit),
1275 prefix, yes_no(s->guess_main_pid),
1276 prefix, service_type_to_string(s->type),
1277 prefix, service_restart_to_string(s->restart),
1278 prefix, notify_access_to_string(s->notify_access));
1279
1280 if (s->control_pid > 0)
1281 fprintf(f,
1282 "%sControl PID: "PID_FMT"\n",
1283 prefix, s->control_pid);
1284
1285 if (s->main_pid > 0)
1286 fprintf(f,
1287 "%sMain PID: "PID_FMT"\n"
1288 "%sMain PID Known: %s\n"
1289 "%sMain PID Alien: %s\n",
1290 prefix, s->main_pid,
1291 prefix, yes_no(s->main_pid_known),
1292 prefix, yes_no(s->main_pid_alien));
1293
1294 if (s->pid_file)
1295 fprintf(f,
1296 "%sPIDFile: %s\n",
1297 prefix, s->pid_file);
1298
1299 if (s->bus_name)
1300 fprintf(f,
1301 "%sBusName: %s\n"
1302 "%sBus Name Good: %s\n",
1303 prefix, s->bus_name,
1304 prefix, yes_no(s->bus_name_good));
1305
1306 kill_context_dump(&s->kill_context, f, prefix);
1307 exec_context_dump(&s->exec_context, f, prefix);
1308
1309 for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
1310
1311 if (!s->exec_command[c])
1312 continue;
1313
1314 fprintf(f, "%s-> %s:\n",
1315 prefix, service_exec_command_to_string(c));
1316
1317 exec_command_dump_list(s->exec_command[c], f, prefix2);
1318 }
1319
1320 #ifdef HAVE_SYSV_COMPAT
1321 if (s->is_sysv)
1322 fprintf(f,
1323 "%sSysV Init Script has LSB Header: %s\n"
1324 "%sSysVEnabled: %s\n",
1325 prefix, yes_no(s->sysv_has_lsb),
1326 prefix, yes_no(s->sysv_enabled));
1327
1328 if (s->sysv_start_priority >= 0)
1329 fprintf(f,
1330 "%sSysVStartPriority: %i\n",
1331 prefix, s->sysv_start_priority);
1332
1333 if (s->sysv_runlevels)
1334 fprintf(f, "%sSysVRunLevels: %s\n",
1335 prefix, s->sysv_runlevels);
1336 #endif
1337
1338 if (s->status_text)
1339 fprintf(f, "%sStatus Text: %s\n",
1340 prefix, s->status_text);
1341 }
1342
1343 static int service_load_pid_file(Service *s, bool may_warn) {
1344 _cleanup_free_ char *k = NULL;
1345 int r;
1346 pid_t pid;
1347
1348 assert(s);
1349
1350 if (!s->pid_file)
1351 return -ENOENT;
1352
1353 r = read_one_line_file(s->pid_file, &k);
1354 if (r < 0) {
1355 if (may_warn)
1356 log_info_unit(UNIT(s)->id,
1357 "PID file %s not readable (yet?) after %s.",
1358 s->pid_file, service_state_to_string(s->state));
1359 return r;
1360 }
1361
1362 r = parse_pid(k, &pid);
1363 if (r < 0) {
1364 if (may_warn)
1365 log_info_unit(UNIT(s)->id,
1366 "Failed to read PID from file %s: %s",
1367 s->pid_file, strerror(-r));
1368 return r;
1369 }
1370
1371 if (kill(pid, 0) < 0 && errno != EPERM) {
1372 if (may_warn)
1373 log_info_unit(UNIT(s)->id,
1374 "PID "PID_FMT" read from file %s does not exist.",
1375 pid, s->pid_file);
1376 return -ESRCH;
1377 }
1378
1379 if (s->main_pid_known) {
1380 if (pid == s->main_pid)
1381 return 0;
1382
1383 log_debug_unit(UNIT(s)->id,
1384 "Main PID changing: "PID_FMT" -> "PID_FMT,
1385 s->main_pid, pid);
1386 service_unwatch_main_pid(s);
1387 s->main_pid_known = false;
1388 } else
1389 log_debug_unit(UNIT(s)->id,
1390 "Main PID loaded: "PID_FMT, pid);
1391
1392 r = service_set_main_pid(s, pid);
1393 if (r < 0)
1394 return r;
1395
1396 r = unit_watch_pid(UNIT(s), pid);
1397 if (r < 0) {
1398 /* FIXME: we need to do something here */
1399 log_warning_unit(UNIT(s)->id,
1400 "Failed to watch PID "PID_FMT" from service %s",
1401 pid, UNIT(s)->id);
1402 return r;
1403 }
1404
1405 return 0;
1406 }
1407
1408 static int service_search_main_pid(Service *s) {
1409 pid_t pid;
1410 int r;
1411
1412 assert(s);
1413
1414 /* If we know it anyway, don't ever fallback to unreliable
1415 * heuristics */
1416 if (s->main_pid_known)
1417 return 0;
1418
1419 if (!s->guess_main_pid)
1420 return 0;
1421
1422 assert(s->main_pid <= 0);
1423
1424 pid = unit_search_main_pid(UNIT(s));
1425 if (pid <= 0)
1426 return -ENOENT;
1427
1428 log_debug_unit(UNIT(s)->id,
1429 "Main PID guessed: "PID_FMT, pid);
1430 r = service_set_main_pid(s, pid);
1431 if (r < 0)
1432 return r;
1433
1434 r = unit_watch_pid(UNIT(s), pid);
1435 if (r < 0)
1436 /* FIXME: we need to do something here */
1437 log_warning_unit(UNIT(s)->id,
1438 "Failed to watch PID "PID_FMT" from service %s",
1439 pid, UNIT(s)->id);
1440 return r;
1441
1442 return 0;
1443 }
1444
1445 static void service_set_state(Service *s, ServiceState state) {
1446 ServiceState old_state;
1447 const UnitActiveState *table;
1448
1449 assert(s);
1450
1451 table = s->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
1452
1453 old_state = s->state;
1454 s->state = state;
1455
1456 service_unwatch_pid_file(s);
1457
1458 if (!IN_SET(state,
1459 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
1460 SERVICE_RELOAD,
1461 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
1462 SERVICE_STOP_POST,
1463 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL,
1464 SERVICE_AUTO_RESTART))
1465 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
1466
1467 if (!IN_SET(state,
1468 SERVICE_START, SERVICE_START_POST,
1469 SERVICE_RUNNING, SERVICE_RELOAD,
1470 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
1471 SERVICE_STOP_POST,
1472 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
1473 service_unwatch_main_pid(s);
1474 s->main_command = NULL;
1475 }
1476
1477 if (!IN_SET(state,
1478 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
1479 SERVICE_RELOAD,
1480 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
1481 SERVICE_STOP_POST,
1482 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
1483 service_unwatch_control_pid(s);
1484 s->control_command = NULL;
1485 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1486 }
1487
1488 if (IN_SET(state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
1489 unit_unwatch_all_pids(UNIT(s));
1490
1491 if (!IN_SET(state,
1492 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
1493 SERVICE_RUNNING, SERVICE_RELOAD,
1494 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST,
1495 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL) &&
1496 !(state == SERVICE_DEAD && UNIT(s)->job)) {
1497 service_close_socket_fd(s);
1498 service_connection_unref(s);
1499 }
1500
1501 if (!IN_SET(state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
1502 service_stop_watchdog(s);
1503
1504 /* For the inactive states unit_notify() will trim the cgroup,
1505 * but for exit we have to do that ourselves... */
1506 if (state == SERVICE_EXITED && UNIT(s)->manager->n_reloading <= 0)
1507 unit_destroy_cgroup(UNIT(s));
1508
1509 /* For remain_after_exit services, let's see if we can "release" the
1510 * hold on the console, since unit_notify() only does that in case of
1511 * change of state */
1512 if (state == SERVICE_EXITED && s->remain_after_exit &&
1513 UNIT(s)->manager->n_on_console > 0) {
1514 ExecContext *ec = unit_get_exec_context(UNIT(s));
1515 if (ec && exec_context_may_touch_console(ec)) {
1516 Manager *m = UNIT(s)->manager;
1517
1518 m->n_on_console --;
1519 if (m->n_on_console == 0)
1520 /* unset no_console_output flag, since the console is free */
1521 m->no_console_output = false;
1522 }
1523 }
1524
1525 if (old_state != state)
1526 log_debug_unit(UNIT(s)->id, "%s changed %s -> %s", UNIT(s)->id, service_state_to_string(old_state), service_state_to_string(state));
1527
1528 unit_notify(UNIT(s), table[old_state], table[state], s->reload_result == SERVICE_SUCCESS);
1529 s->reload_result = SERVICE_SUCCESS;
1530 }
1531
1532 static int service_coldplug(Unit *u) {
1533 Service *s = SERVICE(u);
1534 int r;
1535
1536 assert(s);
1537 assert(s->state == SERVICE_DEAD);
1538
1539 if (s->deserialized_state != s->state) {
1540
1541 if (IN_SET(s->deserialized_state,
1542 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
1543 SERVICE_RELOAD,
1544 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
1545 SERVICE_STOP_POST,
1546 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
1547
1548 usec_t k;
1549
1550 k = IN_SET(s->deserialized_state, SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST, SERVICE_RELOAD) ? s->timeout_start_usec : s->timeout_stop_usec;
1551
1552 /* For the start/stop timeouts 0 means off */
1553 if (k > 0) {
1554 r = service_arm_timer(s, k);
1555 if (r < 0)
1556 return r;
1557 }
1558 }
1559
1560 if (s->deserialized_state == SERVICE_AUTO_RESTART) {
1561
1562 /* The restart timeouts 0 means immediately */
1563 r = service_arm_timer(s, s->restart_usec);
1564 if (r < 0)
1565 return r;
1566 }
1567
1568 if (pid_valid(s->main_pid) &&
1569 ((s->deserialized_state == SERVICE_START && IN_SET(s->type, SERVICE_FORKING, SERVICE_DBUS, SERVICE_ONESHOT, SERVICE_NOTIFY)) ||
1570 IN_SET(s->deserialized_state,
1571 SERVICE_START, SERVICE_START_POST,
1572 SERVICE_RUNNING, SERVICE_RELOAD,
1573 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
1574 SERVICE_STOP_POST,
1575 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL))) {
1576 r = unit_watch_pid(UNIT(s), s->main_pid);
1577 if (r < 0)
1578 return r;
1579 }
1580
1581 if (pid_valid(s->control_pid) &&
1582 IN_SET(s->deserialized_state,
1583 SERVICE_START_PRE, SERVICE_START, SERVICE_START_POST,
1584 SERVICE_RELOAD,
1585 SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL,
1586 SERVICE_STOP_POST,
1587 SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL)) {
1588 r = unit_watch_pid(UNIT(s), s->control_pid);
1589 if (r < 0)
1590 return r;
1591 }
1592
1593 if (!IN_SET(s->deserialized_state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_AUTO_RESTART))
1594 unit_watch_all_pids(UNIT(s));
1595
1596 if (IN_SET(s->deserialized_state, SERVICE_START_POST, SERVICE_RUNNING, SERVICE_RELOAD))
1597 service_start_watchdog(s);
1598
1599 service_set_state(s, s->deserialized_state);
1600 }
1601
1602 return 0;
1603 }
1604
1605 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1606 Iterator i;
1607 int r;
1608 int *rfds = NULL;
1609 unsigned rn_fds = 0;
1610 Unit *u;
1611
1612 assert(s);
1613 assert(fds);
1614 assert(n_fds);
1615
1616 if (s->socket_fd >= 0)
1617 return 0;
1618
1619 SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i) {
1620 int *cfds;
1621 unsigned cn_fds;
1622 Socket *sock;
1623
1624 if (u->type != UNIT_SOCKET)
1625 continue;
1626
1627 sock = SOCKET(u);
1628
1629 r = socket_collect_fds(sock, &cfds, &cn_fds);
1630 if (r < 0)
1631 goto fail;
1632
1633 if (!cfds)
1634 continue;
1635
1636 if (!rfds) {
1637 rfds = cfds;
1638 rn_fds = cn_fds;
1639 } else {
1640 int *t;
1641
1642 t = new(int, rn_fds+cn_fds);
1643 if (!t) {
1644 free(cfds);
1645 r = -ENOMEM;
1646 goto fail;
1647 }
1648
1649 memcpy(t, rfds, rn_fds * sizeof(int));
1650 memcpy(t+rn_fds, cfds, cn_fds * sizeof(int));
1651 free(rfds);
1652 free(cfds);
1653
1654 rfds = t;
1655 rn_fds = rn_fds+cn_fds;
1656 }
1657 }
1658
1659 *fds = rfds;
1660 *n_fds = rn_fds;
1661
1662 return 0;
1663
1664 fail:
1665 free(rfds);
1666
1667 return r;
1668 }
1669
1670 static int service_spawn(
1671 Service *s,
1672 ExecCommand *c,
1673 bool timeout,
1674 bool pass_fds,
1675 bool apply_permissions,
1676 bool apply_chroot,
1677 bool apply_tty_stdin,
1678 bool set_notify_socket,
1679 bool is_control,
1680 pid_t *_pid) {
1681
1682 pid_t pid;
1683 int r;
1684 int *fds = NULL;
1685 _cleanup_free_ int *fdsbuf = NULL;
1686 unsigned n_fds = 0, n_env = 0;
1687 _cleanup_strv_free_ char
1688 **argv = NULL, **final_env = NULL, **our_env = NULL;
1689 const char *path;
1690
1691 assert(s);
1692 assert(c);
1693 assert(_pid);
1694
1695 unit_realize_cgroup(UNIT(s));
1696
1697 r = unit_setup_exec_runtime(UNIT(s));
1698 if (r < 0)
1699 goto fail;
1700
1701 if (pass_fds ||
1702 s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1703 s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1704 s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1705
1706 if (s->socket_fd >= 0) {
1707 fds = &s->socket_fd;
1708 n_fds = 1;
1709 } else {
1710 r = service_collect_fds(s, &fdsbuf, &n_fds);
1711 if (r < 0)
1712 goto fail;
1713
1714 fds = fdsbuf;
1715 }
1716 }
1717
1718 if (timeout && s->timeout_start_usec > 0) {
1719 r = service_arm_timer(s, s->timeout_start_usec);
1720 if (r < 0)
1721 goto fail;
1722 } else
1723 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
1724
1725 r = unit_full_printf_strv(UNIT(s), c->argv, &argv);
1726 if (r < 0)
1727 goto fail;
1728
1729 our_env = new0(char*, 4);
1730 if (!our_env) {
1731 r = -ENOMEM;
1732 goto fail;
1733 }
1734
1735 if (set_notify_socket)
1736 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", UNIT(s)->manager->notify_socket) < 0) {
1737 r = -ENOMEM;
1738 goto fail;
1739 }
1740
1741 if (s->main_pid > 0)
1742 if (asprintf(our_env + n_env++, "MAINPID="PID_FMT, s->main_pid) < 0) {
1743 r = -ENOMEM;
1744 goto fail;
1745 }
1746
1747 if (UNIT(s)->manager->running_as != SYSTEMD_SYSTEM)
1748 if (asprintf(our_env + n_env++, "MANAGERPID="PID_FMT, getpid()) < 0) {
1749 r = -ENOMEM;
1750 goto fail;
1751 }
1752
1753 final_env = strv_env_merge(2, UNIT(s)->manager->environment, our_env, NULL);
1754 if (!final_env) {
1755 r = -ENOMEM;
1756 goto fail;
1757 }
1758
1759 if (is_control && UNIT(s)->cgroup_path) {
1760 path = strappenda(UNIT(s)->cgroup_path, "/control");
1761 cg_create(SYSTEMD_CGROUP_CONTROLLER, path);
1762 } else
1763 path = UNIT(s)->cgroup_path;
1764
1765 r = exec_spawn(c,
1766 argv,
1767 &s->exec_context,
1768 fds, n_fds,
1769 final_env,
1770 apply_permissions,
1771 apply_chroot,
1772 apply_tty_stdin,
1773 UNIT(s)->manager->confirm_spawn,
1774 UNIT(s)->manager->cgroup_supported,
1775 path,
1776 UNIT(s)->id,
1777 s->watchdog_usec,
1778 s->type == SERVICE_IDLE ? UNIT(s)->manager->idle_pipe : NULL,
1779 s->exec_runtime,
1780 &pid);
1781 if (r < 0)
1782 goto fail;
1783
1784 r = unit_watch_pid(UNIT(s), pid);
1785 if (r < 0)
1786 /* FIXME: we need to do something here */
1787 goto fail;
1788
1789 *_pid = pid;
1790
1791 return 0;
1792
1793 fail:
1794 if (timeout)
1795 s->timer_event_source = sd_event_source_unref(s->timer_event_source);
1796
1797 return r;
1798 }
1799
1800 static int main_pid_good(Service *s) {
1801 assert(s);
1802
1803 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1804 * don't know */
1805
1806 /* If we know the pid file, then lets just check if it is
1807 * still valid */
1808 if (s->main_pid_known) {
1809
1810 /* If it's an alien child let's check if it is still
1811 * alive ... */
1812 if (s->main_pid_alien && s->main_pid > 0)
1813 return kill(s->main_pid, 0) >= 0 || errno != ESRCH;
1814
1815 /* .. otherwise assume we'll get a SIGCHLD for it,
1816 * which we really should wait for to collect exit
1817 * status and code */
1818 return s->main_pid > 0;
1819 }
1820
1821 /* We don't know the pid */
1822 return -EAGAIN;
1823 }
1824
1825 _pure_ static int control_pid_good(Service *s) {
1826 assert(s);
1827
1828 return s->control_pid > 0;
1829 }
1830
1831 static int cgroup_good(Service *s) {
1832 int r;
1833
1834 assert(s);
1835
1836 if (!UNIT(s)->cgroup_path)
1837 return 0;
1838
1839 r = cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER, UNIT(s)->cgroup_path, true);
1840 if (r < 0)
1841 return r;
1842
1843 return !r;
1844 }
1845
1846 static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart) {
1847 int r;
1848 assert(s);
1849
1850 if (f != SERVICE_SUCCESS)
1851 s->result = f;
1852
1853 service_set_state(s, s->result != SERVICE_SUCCESS ? SERVICE_FAILED : SERVICE_DEAD);
1854
1855 if (allow_restart &&
1856 !s->forbid_restart &&
1857 (s->restart == SERVICE_RESTART_ALWAYS ||
1858 (s->restart == SERVICE_RESTART_ON_SUCCESS && s->result == SERVICE_SUCCESS) ||
1859 (s->restart == SERVICE_RESTART_ON_FAILURE && s->result != SERVICE_SUCCESS) ||
1860 (s->restart == SERVICE_RESTART_ON_WATCHDOG && s->result == SERVICE_FAILURE_WATCHDOG) ||
1861 (s->restart == SERVICE_RESTART_ON_ABORT && (s->result == SERVICE_FAILURE_SIGNAL ||
1862 s->result == SERVICE_FAILURE_CORE_DUMP))) &&
1863 (s->result != SERVICE_FAILURE_EXIT_CODE ||
1864 !set_contains(s->restart_ignore_status.code, INT_TO_PTR(s->main_exec_status.status))) &&
1865 (s->result != SERVICE_FAILURE_SIGNAL ||
1866 !set_contains(s->restart_ignore_status.signal, INT_TO_PTR(s->main_exec_status.status)))) {
1867
1868 r = service_arm_timer(s, s->restart_usec);
1869 if (r < 0)
1870 goto fail;
1871
1872 service_set_state(s, SERVICE_AUTO_RESTART);
1873 }
1874
1875 s->forbid_restart = false;
1876
1877 /* we want fresh tmpdirs in case service is started again immediately */
1878 exec_runtime_destroy(s->exec_runtime);
1879 s->exec_runtime = exec_runtime_unref(s->exec_runtime);
1880
1881 /* Try to delete the pid file. At this point it will be
1882 * out-of-date, and some software might be confused by it, so
1883 * let's remove it. */
1884 if (s->pid_file)
1885 unlink_noerrno(s->pid_file);
1886
1887 return;
1888
1889 fail:
1890 log_warning_unit(UNIT(s)->id,
1891 "%s failed to run install restart timer: %s",
1892 UNIT(s)->id, strerror(-r));
1893 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1894 }
1895
1896 static void service_enter_stop_post(Service *s, ServiceResult f) {
1897 int r;
1898 assert(s);
1899
1900 if (f != SERVICE_SUCCESS)
1901 s->result = f;
1902
1903 service_unwatch_control_pid(s);
1904 unit_watch_all_pids(UNIT(s));
1905
1906 s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST];
1907 if (s->control_command) {
1908 s->control_command_id = SERVICE_EXEC_STOP_POST;
1909
1910 r = service_spawn(s,
1911 s->control_command,
1912 true,
1913 false,
1914 !s->permissions_start_only,
1915 !s->root_directory_start_only,
1916 true,
1917 false,
1918 true,
1919 &s->control_pid);
1920 if (r < 0)
1921 goto fail;
1922
1923 service_set_state(s, SERVICE_STOP_POST);
1924 } else
1925 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_SUCCESS);
1926
1927 return;
1928
1929 fail:
1930 log_warning_unit(UNIT(s)->id,
1931 "%s failed to run 'stop-post' task: %s",
1932 UNIT(s)->id, strerror(-r));
1933 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1934 }
1935
1936 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) {
1937 int r;
1938
1939 assert(s);
1940
1941 if (f != SERVICE_SUCCESS)
1942 s->result = f;
1943
1944 unit_watch_all_pids(UNIT(s));
1945
1946 r = unit_kill_context(
1947 UNIT(s),
1948 &s->kill_context,
1949 state != SERVICE_STOP_SIGTERM && state != SERVICE_FINAL_SIGTERM,
1950 s->main_pid,
1951 s->control_pid,
1952 s->main_pid_alien);
1953
1954 if (r < 0)
1955 goto fail;
1956
1957 if (r > 0) {
1958 if (s->timeout_stop_usec > 0) {
1959 r = service_arm_timer(s, s->timeout_stop_usec);
1960 if (r < 0)
1961 goto fail;
1962 }
1963
1964 service_set_state(s, state);
1965 } else if (state == SERVICE_STOP_SIGTERM)
1966 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_SUCCESS);
1967 else if (state == SERVICE_STOP_SIGKILL)
1968 service_enter_stop_post(s, SERVICE_SUCCESS);
1969 else if (state == SERVICE_FINAL_SIGTERM)
1970 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_SUCCESS);
1971 else
1972 service_enter_dead(s, SERVICE_SUCCESS, true);
1973
1974 return;
1975
1976 fail:
1977 log_warning_unit(UNIT(s)->id,
1978 "%s failed to kill processes: %s", UNIT(s)->id, strerror(-r));
1979
1980 if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1981 service_enter_stop_post(s, SERVICE_FAILURE_RESOURCES);
1982 else
1983 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1984 }
1985
1986 static void service_enter_stop(Service *s, ServiceResult f) {
1987 int r;
1988
1989 assert(s);
1990
1991 if (f != SERVICE_SUCCESS)
1992 s->result = f;
1993
1994 service_unwatch_control_pid(s);
1995 unit_watch_all_pids(UNIT(s));
1996
1997 s->control_command = s->exec_command[SERVICE_EXEC_STOP];
1998 if (s->control_command) {
1999 s->control_command_id = SERVICE_EXEC_STOP;
2000
2001 r = service_spawn(s,
2002 s->control_command,
2003 true,
2004 false,
2005 !s->permissions_start_only,
2006 !s->root_directory_start_only,
2007 false,
2008 false,
2009 true,
2010 &s->control_pid);
2011 if (r < 0)
2012 goto fail;
2013
2014 service_set_state(s, SERVICE_STOP);
2015 } else
2016 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2017
2018 return;
2019
2020 fail:
2021 log_warning_unit(UNIT(s)->id,
2022 "%s failed to run 'stop' task: %s", UNIT(s)->id, strerror(-r));
2023 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2024 }
2025
2026 static void service_enter_running(Service *s, ServiceResult f) {
2027 int main_pid_ok, cgroup_ok;
2028 assert(s);
2029
2030 if (f != SERVICE_SUCCESS)
2031 s->result = f;
2032
2033 main_pid_ok = main_pid_good(s);
2034 cgroup_ok = cgroup_good(s);
2035
2036 if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
2037 (s->bus_name_good || s->type != SERVICE_DBUS))
2038 service_set_state(s, SERVICE_RUNNING);
2039 else if (s->remain_after_exit)
2040 service_set_state(s, SERVICE_EXITED);
2041 else
2042 service_enter_stop(s, SERVICE_SUCCESS);
2043 }
2044
2045 static void service_enter_start_post(Service *s) {
2046 int r;
2047 assert(s);
2048
2049 service_unwatch_control_pid(s);
2050 service_reset_watchdog(s);
2051
2052 s->control_command = s->exec_command[SERVICE_EXEC_START_POST];
2053 if (s->control_command) {
2054 s->control_command_id = SERVICE_EXEC_START_POST;
2055
2056 r = service_spawn(s,
2057 s->control_command,
2058 true,
2059 false,
2060 !s->permissions_start_only,
2061 !s->root_directory_start_only,
2062 false,
2063 false,
2064 true,
2065 &s->control_pid);
2066 if (r < 0)
2067 goto fail;
2068
2069 service_set_state(s, SERVICE_START_POST);
2070 } else
2071 service_enter_running(s, SERVICE_SUCCESS);
2072
2073 return;
2074
2075 fail:
2076 log_warning_unit(UNIT(s)->id,
2077 "%s failed to run 'start-post' task: %s", UNIT(s)->id, strerror(-r));
2078 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2079 }
2080
2081 static void service_kill_control_processes(Service *s) {
2082 char *p;
2083
2084 if (!UNIT(s)->cgroup_path)
2085 return;
2086
2087 p = strappenda(UNIT(s)->cgroup_path, "/control");
2088 cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER, p, SIGKILL, true, true, true, NULL);
2089 }
2090
2091 static void service_enter_start(Service *s) {
2092 ExecCommand *c;
2093 pid_t pid;
2094 int r;
2095
2096 assert(s);
2097
2098 assert(s->exec_command[SERVICE_EXEC_START]);
2099 assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
2100
2101 service_unwatch_control_pid(s);
2102 service_unwatch_main_pid(s);
2103
2104 /* We want to ensure that nobody leaks processes from
2105 * START_PRE here, so let's go on a killing spree, People
2106 * should not spawn long running processes from START_PRE. */
2107 service_kill_control_processes(s);
2108
2109 if (s->type == SERVICE_FORKING) {
2110 s->control_command_id = SERVICE_EXEC_START;
2111 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
2112
2113 s->main_command = NULL;
2114 } else {
2115 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2116 s->control_command = NULL;
2117
2118 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
2119 }
2120
2121 r = service_spawn(s,
2122 c,
2123 s->type == SERVICE_FORKING || s->type == SERVICE_DBUS ||
2124 s->type == SERVICE_NOTIFY || s->type == SERVICE_ONESHOT,
2125 true,
2126 true,
2127 true,
2128 true,
2129 s->notify_access != NOTIFY_NONE,
2130 false,
2131 &pid);
2132 if (r < 0)
2133 goto fail;
2134
2135 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_IDLE) {
2136 /* For simple services we immediately start
2137 * the START_POST binaries. */
2138
2139 service_set_main_pid(s, pid);
2140 service_enter_start_post(s);
2141
2142 } else if (s->type == SERVICE_FORKING) {
2143
2144 /* For forking services we wait until the start
2145 * process exited. */
2146
2147 s->control_pid = pid;
2148 service_set_state(s, SERVICE_START);
2149
2150 } else if (s->type == SERVICE_ONESHOT ||
2151 s->type == SERVICE_DBUS ||
2152 s->type == SERVICE_NOTIFY) {
2153
2154 /* For oneshot services we wait until the start
2155 * process exited, too, but it is our main process. */
2156
2157 /* For D-Bus services we know the main pid right away,
2158 * but wait for the bus name to appear on the
2159 * bus. Notify services are similar. */
2160
2161 service_set_main_pid(s, pid);
2162 service_set_state(s, SERVICE_START);
2163 } else
2164 assert_not_reached("Unknown service type");
2165
2166 return;
2167
2168 fail:
2169 log_warning_unit(UNIT(s)->id,
2170 "%s failed to run 'start' task: %s", UNIT(s)->id, strerror(-r));
2171 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2172 }
2173
2174 static void service_enter_start_pre(Service *s) {
2175 int r;
2176
2177 assert(s);
2178
2179 service_unwatch_control_pid(s);
2180
2181 s->control_command = s->exec_command[SERVICE_EXEC_START_PRE];
2182 if (s->control_command) {
2183 /* Before we start anything, let's clear up what might
2184 * be left from previous runs. */
2185 service_kill_control_processes(s);
2186
2187 s->control_command_id = SERVICE_EXEC_START_PRE;
2188
2189 r = service_spawn(s,
2190 s->control_command,
2191 true,
2192 false,
2193 !s->permissions_start_only,
2194 !s->root_directory_start_only,
2195 true,
2196 false,
2197 true,
2198 &s->control_pid);
2199 if (r < 0)
2200 goto fail;
2201
2202 service_set_state(s, SERVICE_START_PRE);
2203 } else
2204 service_enter_start(s);
2205
2206 return;
2207
2208 fail:
2209 log_warning_unit(UNIT(s)->id,
2210 "%s failed to run 'start-pre' task: %s", UNIT(s)->id, strerror(-r));
2211 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2212 }
2213
2214 static void service_enter_restart(Service *s) {
2215 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
2216 int r;
2217
2218 assert(s);
2219
2220 if (UNIT(s)->job && UNIT(s)->job->type == JOB_STOP) {
2221 /* Don't restart things if we are going down anyway */
2222 log_info_unit(UNIT(s)->id,
2223 "Stop job pending for unit, delaying automatic restart.");
2224
2225 r = service_arm_timer(s, s->restart_usec);
2226 if (r < 0)
2227 goto fail;
2228
2229 return;
2230 }
2231
2232 /* Any units that are bound to this service must also be
2233 * restarted. We use JOB_RESTART (instead of the more obvious
2234 * JOB_START) here so that those dependency jobs will be added
2235 * as well. */
2236 r = manager_add_job(UNIT(s)->manager, JOB_RESTART, UNIT(s), JOB_FAIL, false, &error, NULL);
2237 if (r < 0)
2238 goto fail;
2239
2240 /* Note that we stay in the SERVICE_AUTO_RESTART state here,
2241 * it will be canceled as part of the service_stop() call that
2242 * is executed as part of JOB_RESTART. */
2243
2244 log_debug_unit(UNIT(s)->id,
2245 "%s scheduled restart job.", UNIT(s)->id);
2246 return;
2247
2248 fail:
2249 log_warning_unit(UNIT(s)->id,
2250 "%s failed to schedule restart job: %s",
2251 UNIT(s)->id, bus_error_message(&error, -r));
2252 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
2253 }
2254
2255 static void service_enter_reload(Service *s) {
2256 int r;
2257
2258 assert(s);
2259
2260 service_unwatch_control_pid(s);
2261
2262 s->control_command = s->exec_command[SERVICE_EXEC_RELOAD];
2263 if (s->control_command) {
2264 s->control_command_id = SERVICE_EXEC_RELOAD;
2265
2266 r = service_spawn(s,
2267 s->control_command,
2268 true,
2269 false,
2270 !s->permissions_start_only,
2271 !s->root_directory_start_only,
2272 false,
2273 false,
2274 true,
2275 &s->control_pid);
2276 if (r < 0)
2277 goto fail;
2278
2279 service_set_state(s, SERVICE_RELOAD);
2280 } else
2281 service_enter_running(s, SERVICE_SUCCESS);
2282
2283 return;
2284
2285 fail:
2286 log_warning_unit(UNIT(s)->id,
2287 "%s failed to run 'reload' task: %s",
2288 UNIT(s)->id, strerror(-r));
2289 s->reload_result = SERVICE_FAILURE_RESOURCES;
2290 service_enter_running(s, SERVICE_SUCCESS);
2291 }
2292
2293 static void service_run_next_control(Service *s) {
2294 int r;
2295
2296 assert(s);
2297 assert(s->control_command);
2298 assert(s->control_command->command_next);
2299
2300 assert(s->control_command_id != SERVICE_EXEC_START);
2301
2302 s->control_command = s->control_command->command_next;
2303 service_unwatch_control_pid(s);
2304
2305 r = service_spawn(s,
2306 s->control_command,
2307 true,
2308 false,
2309 !s->permissions_start_only,
2310 !s->root_directory_start_only,
2311 s->control_command_id == SERVICE_EXEC_START_PRE ||
2312 s->control_command_id == SERVICE_EXEC_STOP_POST,
2313 false,
2314 true,
2315 &s->control_pid);
2316 if (r < 0)
2317 goto fail;
2318
2319 return;
2320
2321 fail:
2322 log_warning_unit(UNIT(s)->id,
2323 "%s failed to run next control task: %s",
2324 UNIT(s)->id, strerror(-r));
2325
2326 if (s->state == SERVICE_START_PRE)
2327 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2328 else if (s->state == SERVICE_STOP)
2329 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2330 else if (s->state == SERVICE_STOP_POST)
2331 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2332 else if (s->state == SERVICE_RELOAD) {
2333 s->reload_result = SERVICE_FAILURE_RESOURCES;
2334 service_enter_running(s, SERVICE_SUCCESS);
2335 } else
2336 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2337 }
2338
2339 static void service_run_next_main(Service *s) {
2340 pid_t pid;
2341 int r;
2342
2343 assert(s);
2344 assert(s->main_command);
2345 assert(s->main_command->command_next);
2346 assert(s->type == SERVICE_ONESHOT);
2347
2348 s->main_command = s->main_command->command_next;
2349 service_unwatch_main_pid(s);
2350
2351 r = service_spawn(s,
2352 s->main_command,
2353 true,
2354 true,
2355 true,
2356 true,
2357 true,
2358 s->notify_access != NOTIFY_NONE,
2359 false,
2360 &pid);
2361 if (r < 0)
2362 goto fail;
2363
2364 service_set_main_pid(s, pid);
2365
2366 return;
2367
2368 fail:
2369 log_warning_unit(UNIT(s)->id,
2370 "%s failed to run next main task: %s", UNIT(s)->id, strerror(-r));
2371 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2372 }
2373
2374 static int service_start_limit_test(Service *s) {
2375 assert(s);
2376
2377 if (ratelimit_test(&s->start_limit))
2378 return 0;
2379
2380 switch (s->start_limit_action) {
2381
2382 case SERVICE_START_LIMIT_NONE:
2383 log_warning_unit(UNIT(s)->id,
2384 "%s start request repeated too quickly, refusing to start.",
2385 UNIT(s)->id);
2386 break;
2387
2388 case SERVICE_START_LIMIT_REBOOT: {
2389 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
2390 int r;
2391
2392 log_warning_unit(UNIT(s)->id,
2393 "%s start request repeated too quickly, rebooting.", UNIT(s)->id);
2394
2395 r = manager_add_job_by_name(UNIT(s)->manager, JOB_START,
2396 SPECIAL_REBOOT_TARGET, JOB_REPLACE,
2397 true, &error, NULL);
2398 if (r < 0)
2399 log_error_unit(UNIT(s)->id,
2400 "Failed to reboot: %s.", bus_error_message(&error, r));
2401
2402 break;
2403 }
2404
2405 case SERVICE_START_LIMIT_REBOOT_FORCE:
2406 log_warning_unit(UNIT(s)->id,
2407 "%s start request repeated too quickly, forcibly rebooting.", UNIT(s)->id);
2408 UNIT(s)->manager->exit_code = MANAGER_REBOOT;
2409 break;
2410
2411 case SERVICE_START_LIMIT_REBOOT_IMMEDIATE:
2412 log_warning_unit(UNIT(s)->id,
2413 "%s start request repeated too quickly, rebooting immediately.", UNIT(s)->id);
2414 sync();
2415 reboot(RB_AUTOBOOT);
2416 break;
2417
2418 default:
2419 log_error_unit(UNIT(s)->id,
2420 "start limit action=%i", s->start_limit_action);
2421 assert_not_reached("Unknown StartLimitAction.");
2422 }
2423
2424 return -ECANCELED;
2425 }
2426
2427 static int service_start(Unit *u) {
2428 Service *s = SERVICE(u);
2429 int r;
2430
2431 assert(s);
2432
2433 /* We cannot fulfill this request right now, try again later
2434 * please! */
2435 if (s->state == SERVICE_STOP ||
2436 s->state == SERVICE_STOP_SIGTERM ||
2437 s->state == SERVICE_STOP_SIGKILL ||
2438 s->state == SERVICE_STOP_POST ||
2439 s->state == SERVICE_FINAL_SIGTERM ||
2440 s->state == SERVICE_FINAL_SIGKILL)
2441 return -EAGAIN;
2442
2443 /* Already on it! */
2444 if (s->state == SERVICE_START_PRE ||
2445 s->state == SERVICE_START ||
2446 s->state == SERVICE_START_POST)
2447 return 0;
2448
2449 /* A service that will be restarted must be stopped first to
2450 * trigger BindsTo and/or OnFailure dependencies. If a user
2451 * does not want to wait for the holdoff time to elapse, the
2452 * service should be manually restarted, not started. We
2453 * simply return EAGAIN here, so that any start jobs stay
2454 * queued, and assume that the auto restart timer will
2455 * eventually trigger the restart. */
2456 if (s->state == SERVICE_AUTO_RESTART)
2457 return -EAGAIN;
2458
2459 assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED);
2460
2461 /* Make sure we don't enter a busy loop of some kind. */
2462 r = service_start_limit_test(s);
2463 if (r < 0) {
2464 service_enter_dead(s, SERVICE_FAILURE_START_LIMIT, false);
2465 return r;
2466 }
2467
2468 s->result = SERVICE_SUCCESS;
2469 s->reload_result = SERVICE_SUCCESS;
2470 s->main_pid_known = false;
2471 s->main_pid_alien = false;
2472 s->forbid_restart = false;
2473
2474 service_enter_start_pre(s);
2475 return 0;
2476 }
2477
2478 static int service_stop(Unit *u) {
2479 Service *s = SERVICE(u);
2480
2481 assert(s);
2482
2483 /* Don't create restart jobs from here. */
2484 s->forbid_restart = true;
2485
2486 /* Already on it */
2487 if (s->state == SERVICE_STOP ||
2488 s->state == SERVICE_STOP_SIGTERM ||
2489 s->state == SERVICE_STOP_SIGKILL ||
2490 s->state == SERVICE_STOP_POST ||
2491 s->state == SERVICE_FINAL_SIGTERM ||
2492 s->state == SERVICE_FINAL_SIGKILL)
2493 return 0;
2494
2495 /* A restart will be scheduled or is in progress. */
2496 if (s->state == SERVICE_AUTO_RESTART) {
2497 service_set_state(s, SERVICE_DEAD);
2498 return 0;
2499 }
2500
2501 /* If there's already something running we go directly into
2502 * kill mode. */
2503 if (s->state == SERVICE_START_PRE ||
2504 s->state == SERVICE_START ||
2505 s->state == SERVICE_START_POST ||
2506 s->state == SERVICE_RELOAD) {
2507 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2508 return 0;
2509 }
2510
2511 assert(s->state == SERVICE_RUNNING ||
2512 s->state == SERVICE_EXITED);
2513
2514 service_enter_stop(s, SERVICE_SUCCESS);
2515 return 0;
2516 }
2517
2518 static int service_reload(Unit *u) {
2519 Service *s = SERVICE(u);
2520
2521 assert(s);
2522
2523 assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2524
2525 service_enter_reload(s);
2526 return 0;
2527 }
2528
2529 _pure_ static bool service_can_reload(Unit *u) {
2530 Service *s = SERVICE(u);
2531
2532 assert(s);
2533
2534 return !!s->exec_command[SERVICE_EXEC_RELOAD];
2535 }
2536
2537 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2538 Service *s = SERVICE(u);
2539
2540 assert(u);
2541 assert(f);
2542 assert(fds);
2543
2544 unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2545 unit_serialize_item(u, f, "result", service_result_to_string(s->result));
2546 unit_serialize_item(u, f, "reload-result", service_result_to_string(s->reload_result));
2547
2548 if (s->control_pid > 0)
2549 unit_serialize_item_format(u, f, "control-pid", PID_FMT,
2550 s->control_pid);
2551
2552 if (s->main_pid_known && s->main_pid > 0)
2553 unit_serialize_item_format(u, f, "main-pid", PID_FMT, s->main_pid);
2554
2555 unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2556
2557 if (s->status_text)
2558 unit_serialize_item(u, f, "status-text", s->status_text);
2559
2560 /* FIXME: There's a minor uncleanliness here: if there are
2561 * multiple commands attached here, we will start from the
2562 * first one again */
2563 if (s->control_command_id >= 0)
2564 unit_serialize_item(u, f, "control-command",
2565 service_exec_command_to_string(s->control_command_id));
2566
2567 if (s->socket_fd >= 0) {
2568 int copy;
2569
2570 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2571 return copy;
2572
2573 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2574 }
2575
2576 if (s->main_exec_status.pid > 0) {
2577 unit_serialize_item_format(u, f, "main-exec-status-pid", PID_FMT,
2578 s->main_exec_status.pid);
2579 dual_timestamp_serialize(f, "main-exec-status-start",
2580 &s->main_exec_status.start_timestamp);
2581 dual_timestamp_serialize(f, "main-exec-status-exit",
2582 &s->main_exec_status.exit_timestamp);
2583
2584 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2585 unit_serialize_item_format(u, f, "main-exec-status-code", "%i",
2586 s->main_exec_status.code);
2587 unit_serialize_item_format(u, f, "main-exec-status-status", "%i",
2588 s->main_exec_status.status);
2589 }
2590 }
2591 if (dual_timestamp_is_set(&s->watchdog_timestamp))
2592 dual_timestamp_serialize(f, "watchdog-timestamp", &s->watchdog_timestamp);
2593
2594 if (s->forbid_restart)
2595 unit_serialize_item(u, f, "forbid-restart", yes_no(s->forbid_restart));
2596
2597 return 0;
2598 }
2599
2600 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2601 Service *s = SERVICE(u);
2602
2603 assert(u);
2604 assert(key);
2605 assert(value);
2606 assert(fds);
2607
2608 if (streq(key, "state")) {
2609 ServiceState state;
2610
2611 state = service_state_from_string(value);
2612 if (state < 0)
2613 log_debug_unit(u->id, "Failed to parse state value %s", value);
2614 else
2615 s->deserialized_state = state;
2616 } else if (streq(key, "result")) {
2617 ServiceResult f;
2618
2619 f = service_result_from_string(value);
2620 if (f < 0)
2621 log_debug_unit(u->id, "Failed to parse result value %s", value);
2622 else if (f != SERVICE_SUCCESS)
2623 s->result = f;
2624
2625 } else if (streq(key, "reload-result")) {
2626 ServiceResult f;
2627
2628 f = service_result_from_string(value);
2629 if (f < 0)
2630 log_debug_unit(u->id, "Failed to parse reload result value %s", value);
2631 else if (f != SERVICE_SUCCESS)
2632 s->reload_result = f;
2633
2634 } else if (streq(key, "control-pid")) {
2635 pid_t pid;
2636
2637 if (parse_pid(value, &pid) < 0)
2638 log_debug_unit(u->id, "Failed to parse control-pid value %s", value);
2639 else
2640 s->control_pid = pid;
2641 } else if (streq(key, "main-pid")) {
2642 pid_t pid;
2643
2644 if (parse_pid(value, &pid) < 0)
2645 log_debug_unit(u->id, "Failed to parse main-pid value %s", value);
2646 else {
2647 service_set_main_pid(s, pid);
2648 unit_watch_pid(UNIT(s), pid);
2649 }
2650 } else if (streq(key, "main-pid-known")) {
2651 int b;
2652
2653 b = parse_boolean(value);
2654 if (b < 0)
2655 log_debug_unit(u->id, "Failed to parse main-pid-known value %s", value);
2656 else
2657 s->main_pid_known = b;
2658 } else if (streq(key, "status-text")) {
2659 char *t;
2660
2661 t = strdup(value);
2662 if (!t)
2663 log_oom();
2664 else {
2665 free(s->status_text);
2666 s->status_text = t;
2667 }
2668
2669 } else if (streq(key, "control-command")) {
2670 ServiceExecCommand id;
2671
2672 id = service_exec_command_from_string(value);
2673 if (id < 0)
2674 log_debug_unit(u->id, "Failed to parse exec-command value %s", value);
2675 else {
2676 s->control_command_id = id;
2677 s->control_command = s->exec_command[id];
2678 }
2679 } else if (streq(key, "socket-fd")) {
2680 int fd;
2681
2682 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2683 log_debug_unit(u->id, "Failed to parse socket-fd value %s", value);
2684 else {
2685
2686 if (s->socket_fd >= 0)
2687 close_nointr_nofail(s->socket_fd);
2688 s->socket_fd = fdset_remove(fds, fd);
2689 }
2690 } else if (streq(key, "main-exec-status-pid")) {
2691 pid_t pid;
2692
2693 if (parse_pid(value, &pid) < 0)
2694 log_debug_unit(u->id, "Failed to parse main-exec-status-pid value %s", value);
2695 else
2696 s->main_exec_status.pid = pid;
2697 } else if (streq(key, "main-exec-status-code")) {
2698 int i;
2699
2700 if (safe_atoi(value, &i) < 0)
2701 log_debug_unit(u->id, "Failed to parse main-exec-status-code value %s", value);
2702 else
2703 s->main_exec_status.code = i;
2704 } else if (streq(key, "main-exec-status-status")) {
2705 int i;
2706
2707 if (safe_atoi(value, &i) < 0)
2708 log_debug_unit(u->id, "Failed to parse main-exec-status-status value %s", value);
2709 else
2710 s->main_exec_status.status = i;
2711 } else if (streq(key, "main-exec-status-start"))
2712 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2713 else if (streq(key, "main-exec-status-exit"))
2714 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2715 else if (streq(key, "watchdog-timestamp"))
2716 dual_timestamp_deserialize(value, &s->watchdog_timestamp);
2717 else if (streq(key, "forbid-restart")) {
2718 int b;
2719
2720 b = parse_boolean(value);
2721 if (b < 0)
2722 log_debug_unit(u->id, "Failed to parse forbid-restart value %s", value);
2723 else
2724 s->forbid_restart = b;
2725 } else
2726 log_debug_unit(u->id, "Unknown serialization key '%s'", key);
2727
2728 return 0;
2729 }
2730
2731 _pure_ static UnitActiveState service_active_state(Unit *u) {
2732 const UnitActiveState *table;
2733
2734 assert(u);
2735
2736 table = SERVICE(u)->type == SERVICE_IDLE ? state_translation_table_idle : state_translation_table;
2737
2738 return table[SERVICE(u)->state];
2739 }
2740
2741 static const char *service_sub_state_to_string(Unit *u) {
2742 assert(u);
2743
2744 return service_state_to_string(SERVICE(u)->state);
2745 }
2746
2747 static bool service_check_gc(Unit *u) {
2748 Service *s = SERVICE(u);
2749
2750 assert(s);
2751
2752 /* Never clean up services that still have a process around,
2753 * even if the service is formally dead. */
2754 if (cgroup_good(s) > 0 ||
2755 main_pid_good(s) > 0 ||
2756 control_pid_good(s) > 0)
2757 return true;
2758
2759 #ifdef HAVE_SYSV_COMPAT
2760 if (s->is_sysv)
2761 return true;
2762 #endif
2763
2764 return false;
2765 }
2766
2767 _pure_ static bool service_check_snapshot(Unit *u) {
2768 Service *s = SERVICE(u);
2769
2770 assert(s);
2771
2772 return (s->socket_fd < 0);
2773 }
2774
2775 static int service_retry_pid_file(Service *s) {
2776 int r;
2777
2778 assert(s->pid_file);
2779 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2780
2781 r = service_load_pid_file(s, false);
2782 if (r < 0)
2783 return r;
2784
2785 service_unwatch_pid_file(s);
2786
2787 service_enter_running(s, SERVICE_SUCCESS);
2788 return 0;
2789 }
2790
2791 static int service_watch_pid_file(Service *s) {
2792 int r;
2793
2794 log_debug_unit(UNIT(s)->id,
2795 "Setting watch for %s's PID file %s",
2796 UNIT(s)->id, s->pid_file_pathspec->path);
2797 r = path_spec_watch(s->pid_file_pathspec, service_dispatch_io);
2798 if (r < 0)
2799 goto fail;
2800
2801 /* the pidfile might have appeared just before we set the watch */
2802 log_debug_unit(UNIT(s)->id,
2803 "Trying to read %s's PID file %s in case it changed",
2804 UNIT(s)->id, s->pid_file_pathspec->path);
2805 service_retry_pid_file(s);
2806
2807 return 0;
2808 fail:
2809 log_error_unit(UNIT(s)->id,
2810 "Failed to set a watch for %s's PID file %s: %s",
2811 UNIT(s)->id, s->pid_file_pathspec->path, strerror(-r));
2812 service_unwatch_pid_file(s);
2813 return r;
2814 }
2815
2816 static int service_demand_pid_file(Service *s) {
2817 PathSpec *ps;
2818
2819 assert(s->pid_file);
2820 assert(!s->pid_file_pathspec);
2821
2822 ps = new0(PathSpec, 1);
2823 if (!ps)
2824 return -ENOMEM;
2825
2826 ps->unit = UNIT(s);
2827 ps->path = strdup(s->pid_file);
2828 if (!ps->path) {
2829 free(ps);
2830 return -ENOMEM;
2831 }
2832
2833 path_kill_slashes(ps->path);
2834
2835 /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2836 * keep their PID file open all the time. */
2837 ps->type = PATH_MODIFIED;
2838 ps->inotify_fd = -1;
2839
2840 s->pid_file_pathspec = ps;
2841
2842 return service_watch_pid_file(s);
2843 }
2844
2845 static int service_dispatch_io(sd_event_source *source, int fd, uint32_t events, void *userdata) {
2846 PathSpec *p = userdata;
2847 Service *s;
2848
2849 assert(p);
2850
2851 s = SERVICE(p->unit);
2852
2853 assert(s);
2854 assert(fd >= 0);
2855 assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2856 assert(s->pid_file_pathspec);
2857 assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd));
2858
2859 log_debug_unit(UNIT(s)->id, "inotify event for %s", UNIT(s)->id);
2860
2861 if (path_spec_fd_event(p, events) < 0)
2862 goto fail;
2863
2864 if (service_retry_pid_file(s) == 0)
2865 return 0;
2866
2867 if (service_watch_pid_file(s) < 0)
2868 goto fail;
2869
2870 return 0;
2871
2872 fail:
2873 service_unwatch_pid_file(s);
2874 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2875 return 0;
2876 }
2877
2878 static void service_notify_cgroup_empty_event(Unit *u) {
2879 Service *s = SERVICE(u);
2880
2881 assert(u);
2882
2883 log_debug_unit(u->id, "%s: cgroup is empty", u->id);
2884
2885 switch (s->state) {
2886
2887 /* Waiting for SIGCHLD is usually more interesting,
2888 * because it includes return codes/signals. Which is
2889 * why we ignore the cgroup events for most cases,
2890 * except when we don't know pid which to expect the
2891 * SIGCHLD for. */
2892
2893 case SERVICE_START:
2894 case SERVICE_START_POST:
2895 /* If we were hoping for the daemon to write its PID file,
2896 * we can give up now. */
2897 if (s->pid_file_pathspec) {
2898 log_warning_unit(u->id,
2899 "%s never wrote its PID file. Failing.", UNIT(s)->id);
2900 service_unwatch_pid_file(s);
2901 if (s->state == SERVICE_START)
2902 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2903 else
2904 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2905 }
2906 break;
2907
2908 case SERVICE_RUNNING:
2909 /* service_enter_running() will figure out what to do */
2910 service_enter_running(s, SERVICE_SUCCESS);
2911 break;
2912
2913 case SERVICE_STOP_SIGTERM:
2914 case SERVICE_STOP_SIGKILL:
2915
2916 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2917 service_enter_stop_post(s, SERVICE_SUCCESS);
2918
2919 break;
2920
2921 case SERVICE_STOP_POST:
2922 case SERVICE_FINAL_SIGTERM:
2923 case SERVICE_FINAL_SIGKILL:
2924 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2925 service_enter_dead(s, SERVICE_SUCCESS, true);
2926
2927 break;
2928
2929 default:
2930 ;
2931 }
2932 }
2933
2934 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2935 Service *s = SERVICE(u);
2936 ServiceResult f;
2937
2938 assert(s);
2939 assert(pid >= 0);
2940
2941 if (UNIT(s)->fragment_path ? is_clean_exit(code, status, &s->success_status) :
2942 is_clean_exit_lsb(code, status, &s->success_status))
2943 f = SERVICE_SUCCESS;
2944 else if (code == CLD_EXITED)
2945 f = SERVICE_FAILURE_EXIT_CODE;
2946 else if (code == CLD_KILLED)
2947 f = SERVICE_FAILURE_SIGNAL;
2948 else if (code == CLD_DUMPED)
2949 f = SERVICE_FAILURE_CORE_DUMP;
2950 else
2951 assert_not_reached("Unknown code");
2952
2953 if (s->main_pid == pid) {
2954 /* Forking services may occasionally move to a new PID.
2955 * As long as they update the PID file before exiting the old
2956 * PID, they're fine. */
2957 if (service_load_pid_file(s, false) == 0)
2958 return;
2959
2960 s->main_pid = 0;
2961 exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
2962
2963 if (s->main_command) {
2964 /* If this is not a forking service than the
2965 * main process got started and hence we copy
2966 * the exit status so that it is recorded both
2967 * as main and as control process exit
2968 * status */
2969
2970 s->main_command->exec_status = s->main_exec_status;
2971
2972 if (s->main_command->ignore)
2973 f = SERVICE_SUCCESS;
2974 } else if (s->exec_command[SERVICE_EXEC_START]) {
2975
2976 /* If this is a forked process, then we should
2977 * ignore the return value if this was
2978 * configured for the starter process */
2979
2980 if (s->exec_command[SERVICE_EXEC_START]->ignore)
2981 f = SERVICE_SUCCESS;
2982 }
2983
2984 log_struct_unit(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
2985 u->id,
2986 "MESSAGE=%s: main process exited, code=%s, status=%i/%s",
2987 u->id, sigchld_code_to_string(code), status,
2988 strna(code == CLD_EXITED
2989 ? exit_status_to_string(status, EXIT_STATUS_FULL)
2990 : signal_to_string(status)),
2991 "EXIT_CODE=%s", sigchld_code_to_string(code),
2992 "EXIT_STATUS=%i", status,
2993 NULL);
2994
2995 if (f != SERVICE_SUCCESS)
2996 s->result = f;
2997
2998 if (s->main_command &&
2999 s->main_command->command_next &&
3000 f == SERVICE_SUCCESS) {
3001
3002 /* There is another command to *
3003 * execute, so let's do that. */
3004
3005 log_debug_unit(u->id,
3006 "%s running next main command for state %s",
3007 u->id, service_state_to_string(s->state));
3008 service_run_next_main(s);
3009
3010 } else {
3011
3012 /* The service exited, so the service is officially
3013 * gone. */
3014 s->main_command = NULL;
3015
3016 switch (s->state) {
3017
3018 case SERVICE_START_POST:
3019 case SERVICE_RELOAD:
3020 case SERVICE_STOP:
3021 /* Need to wait until the operation is
3022 * done */
3023 break;
3024
3025 case SERVICE_START:
3026 if (s->type == SERVICE_ONESHOT) {
3027 /* This was our main goal, so let's go on */
3028 if (f == SERVICE_SUCCESS)
3029 service_enter_start_post(s);
3030 else
3031 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
3032 break;
3033 }
3034
3035 /* Fall through */
3036
3037 case SERVICE_RUNNING:
3038 service_enter_running(s, f);
3039 break;
3040
3041 case SERVICE_STOP_SIGTERM:
3042 case SERVICE_STOP_SIGKILL:
3043
3044 if (!control_pid_good(s))
3045 service_enter_stop_post(s, f);
3046
3047 /* If there is still a control process, wait for that first */
3048 break;
3049
3050 case SERVICE_STOP_POST:
3051 case SERVICE_FINAL_SIGTERM:
3052 case SERVICE_FINAL_SIGKILL:
3053
3054 if (!control_pid_good(s))
3055 service_enter_dead(s, f, true);
3056 break;
3057
3058 default:
3059 assert_not_reached("Uh, main process died at wrong time.");
3060 }
3061 }
3062
3063 } else if (s->control_pid == pid) {
3064 s->control_pid = 0;
3065
3066 if (s->control_command) {
3067 exec_status_exit(&s->control_command->exec_status,
3068 &s->exec_context, pid, code, status);
3069
3070 if (s->control_command->ignore)
3071 f = SERVICE_SUCCESS;
3072 }
3073
3074 log_full_unit(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE, u->id,
3075 "%s: control process exited, code=%s status=%i",
3076 u->id, sigchld_code_to_string(code), status);
3077
3078 if (f != SERVICE_SUCCESS)
3079 s->result = f;
3080
3081 /* Immediately get rid of the cgroup, so that the
3082 * kernel doesn't delay the cgroup empty messages for
3083 * the service cgroup any longer than necessary */
3084 service_kill_control_processes(s);
3085
3086 if (s->control_command &&
3087 s->control_command->command_next &&
3088 f == SERVICE_SUCCESS) {
3089
3090 /* There is another command to *
3091 * execute, so let's do that. */
3092
3093 log_debug_unit(u->id,
3094 "%s running next control command for state %s",
3095 u->id, service_state_to_string(s->state));
3096 service_run_next_control(s);
3097
3098 } else {
3099 /* No further commands for this step, so let's
3100 * figure out what to do next */
3101
3102 s->control_command = NULL;
3103 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
3104
3105 log_debug_unit(u->id,
3106 "%s got final SIGCHLD for state %s",
3107 u->id, service_state_to_string(s->state));
3108
3109 switch (s->state) {
3110
3111 case SERVICE_START_PRE:
3112 if (f == SERVICE_SUCCESS)
3113 service_enter_start(s);
3114 else
3115 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
3116 break;
3117
3118 case SERVICE_START:
3119 if (s->type != SERVICE_FORKING)
3120 /* Maybe spurious event due to a reload that changed the type? */
3121 break;
3122
3123 if (f != SERVICE_SUCCESS) {
3124 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
3125 break;
3126 }
3127
3128 if (s->pid_file) {
3129 bool has_start_post;
3130 int r;
3131
3132 /* Let's try to load the pid file here if we can.
3133 * The PID file might actually be created by a START_POST
3134 * script. In that case don't worry if the loading fails. */
3135
3136 has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST];
3137 r = service_load_pid_file(s, !has_start_post);
3138 if (!has_start_post && r < 0) {
3139 r = service_demand_pid_file(s);
3140 if (r < 0 || !cgroup_good(s))
3141 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
3142 break;
3143 }
3144 } else
3145 service_search_main_pid(s);
3146
3147 service_enter_start_post(s);
3148 break;
3149
3150 case SERVICE_START_POST:
3151 if (f != SERVICE_SUCCESS) {
3152 service_enter_stop(s, f);
3153 break;
3154 }
3155
3156 if (s->pid_file) {
3157 int r;
3158
3159 r = service_load_pid_file(s, true);
3160 if (r < 0) {
3161 r = service_demand_pid_file(s);
3162 if (r < 0 || !cgroup_good(s))
3163 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
3164 break;
3165 }
3166 } else
3167 service_search_main_pid(s);
3168
3169 service_enter_running(s, SERVICE_SUCCESS);
3170 break;
3171
3172 case SERVICE_RELOAD:
3173 if (f == SERVICE_SUCCESS) {
3174 service_load_pid_file(s, true);
3175 service_search_main_pid(s);
3176 }
3177
3178 s->reload_result = f;
3179 service_enter_running(s, SERVICE_SUCCESS);
3180 break;
3181
3182 case SERVICE_STOP:
3183 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
3184 break;
3185
3186 case SERVICE_STOP_SIGTERM:
3187 case SERVICE_STOP_SIGKILL:
3188 if (main_pid_good(s) <= 0)
3189 service_enter_stop_post(s, f);
3190
3191 /* If there is still a service
3192 * process around, wait until
3193 * that one quit, too */
3194 break;
3195
3196 case SERVICE_STOP_POST:
3197 case SERVICE_FINAL_SIGTERM:
3198 case SERVICE_FINAL_SIGKILL:
3199 if (main_pid_good(s) <= 0)
3200 service_enter_dead(s, f, true);
3201 break;
3202
3203 default:
3204 assert_not_reached("Uh, control process died at wrong time.");
3205 }
3206 }
3207 }
3208
3209 /* Notify clients about changed exit status */
3210 unit_add_to_dbus_queue(u);
3211
3212 /* We got one SIGCHLD for the service, let's watch all
3213 * processes that are now running of the service, and watch
3214 * that. Among the PIDs we then watch will be children
3215 * reassigned to us, which hopefully allows us to identify
3216 * when all children are gone */
3217 unit_tidy_watch_pids(u, s->main_pid, s->control_pid);
3218 unit_watch_all_pids(u);
3219
3220 /* If the PID set is empty now, then let's finish this off */
3221 if (set_isempty(u->pids))
3222 service_notify_cgroup_empty_event(u);
3223 }
3224
3225 static int service_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) {
3226 Service *s = SERVICE(userdata);
3227
3228 assert(s);
3229 assert(source == s->timer_event_source);
3230
3231 switch (s->state) {
3232
3233 case SERVICE_START_PRE:
3234 case SERVICE_START:
3235 log_warning_unit(UNIT(s)->id,
3236 "%s %s operation timed out. Terminating.",
3237 UNIT(s)->id,
3238 s->state == SERVICE_START ? "start" : "start-pre");
3239 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3240 break;
3241
3242 case SERVICE_START_POST:
3243 log_warning_unit(UNIT(s)->id,
3244 "%s start-post operation timed out. Stopping.", UNIT(s)->id);
3245 service_enter_stop(s, SERVICE_FAILURE_TIMEOUT);
3246 break;
3247
3248 case SERVICE_RELOAD:
3249 log_warning_unit(UNIT(s)->id,
3250 "%s reload operation timed out. Stopping.", UNIT(s)->id);
3251 s->reload_result = SERVICE_FAILURE_TIMEOUT;
3252 service_enter_running(s, SERVICE_SUCCESS);
3253 break;
3254
3255 case SERVICE_STOP:
3256 log_warning_unit(UNIT(s)->id,
3257 "%s stopping timed out. Terminating.", UNIT(s)->id);
3258 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3259 break;
3260
3261 case SERVICE_STOP_SIGTERM:
3262 if (s->kill_context.send_sigkill) {
3263 log_warning_unit(UNIT(s)->id,
3264 "%s stop-sigterm timed out. Killing.", UNIT(s)->id);
3265 service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3266 } else {
3267 log_warning_unit(UNIT(s)->id,
3268 "%s stop-sigterm timed out. Skipping SIGKILL.", UNIT(s)->id);
3269 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3270 }
3271
3272 break;
3273
3274 case SERVICE_STOP_SIGKILL:
3275 /* Uh, we sent a SIGKILL and it is still not gone?
3276 * Must be something we cannot kill, so let's just be
3277 * weirded out and continue */
3278
3279 log_warning_unit(UNIT(s)->id,
3280 "%s still around after SIGKILL. Ignoring.", UNIT(s)->id);
3281 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3282 break;
3283
3284 case SERVICE_STOP_POST:
3285 log_warning_unit(UNIT(s)->id,
3286 "%s stop-post timed out. Terminating.", UNIT(s)->id);
3287 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3288 break;
3289
3290 case SERVICE_FINAL_SIGTERM:
3291 if (s->kill_context.send_sigkill) {
3292 log_warning_unit(UNIT(s)->id,
3293 "%s stop-final-sigterm timed out. Killing.", UNIT(s)->id);
3294 service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3295 } else {
3296 log_warning_unit(UNIT(s)->id,
3297 "%s stop-final-sigterm timed out. Skipping SIGKILL. Entering failed mode.",
3298 UNIT(s)->id);
3299 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false);
3300 }
3301
3302 break;
3303
3304 case SERVICE_FINAL_SIGKILL:
3305 log_warning_unit(UNIT(s)->id,
3306 "%s still around after final SIGKILL. Entering failed mode.", UNIT(s)->id);
3307 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true);
3308 break;
3309
3310 case SERVICE_AUTO_RESTART:
3311 log_info_unit(UNIT(s)->id,
3312 "%s holdoff time over, scheduling restart.", UNIT(s)->id);
3313 service_enter_restart(s);
3314 break;
3315
3316 default:
3317 assert_not_reached("Timeout at wrong time.");
3318 }
3319
3320 return 0;
3321 }
3322
3323 static int service_dispatch_watchdog(sd_event_source *source, usec_t usec, void *userdata) {
3324 Service *s = SERVICE(userdata);
3325
3326 assert(s);
3327 assert(source == s->watchdog_event_source);
3328
3329 log_error_unit(UNIT(s)->id, "%s watchdog timeout!", UNIT(s)->id);
3330 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_WATCHDOG);
3331
3332 return 0;
3333 }
3334
3335 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
3336 Service *s = SERVICE(u);
3337 const char *e;
3338 bool notify_dbus = false;
3339
3340 assert(u);
3341
3342 log_debug_unit(u->id, "%s: Got notification message from PID "PID_FMT" (%s...)",
3343 u->id, pid, tags && *tags ? tags[0] : "(empty)");
3344
3345 if (s->notify_access == NOTIFY_NONE) {
3346 log_warning_unit(u->id,
3347 "%s: Got notification message from PID "PID_FMT", but reception is disabled.",
3348 u->id, pid);
3349 return;
3350 }
3351
3352 if (s->notify_access == NOTIFY_MAIN && s->main_pid != 0 && pid != s->main_pid) {
3353 log_warning_unit(u->id,
3354 "%s: Got notification message from PID "PID_FMT", but reception only permitted for PID "PID_FMT,
3355 u->id, pid, s->main_pid);
3356 return;
3357 }
3358
3359 /* Interpret MAINPID= */
3360 if ((e = strv_find_prefix(tags, "MAINPID=")) &&
3361 (s->state == SERVICE_START ||
3362 s->state == SERVICE_START_POST ||
3363 s->state == SERVICE_RUNNING ||
3364 s->state == SERVICE_RELOAD)) {
3365
3366 if (parse_pid(e + 8, &pid) < 0)
3367 log_warning_unit(u->id, "Failed to parse notification message %s", e);
3368 else {
3369 log_debug_unit(u->id, "%s: got %s", u->id, e);
3370 service_set_main_pid(s, pid);
3371 unit_watch_pid(UNIT(s), pid);
3372 notify_dbus = true;
3373 }
3374 }
3375
3376 /* Interpret READY= */
3377 if (s->type == SERVICE_NOTIFY && s->state == SERVICE_START && strv_find(tags, "READY=1")) {
3378 log_debug_unit(u->id, "%s: got READY=1", u->id);
3379 service_enter_start_post(s);
3380 notify_dbus = true;
3381 }
3382
3383 /* Interpret STATUS= */
3384 e = strv_find_prefix(tags, "STATUS=");
3385 if (e) {
3386 char *t;
3387
3388 if (e[7]) {
3389 if (!utf8_is_valid(e+7)) {
3390 log_warning_unit(u->id, "Status message in notification is not UTF-8 clean.");
3391 return;
3392 }
3393
3394 log_debug_unit(u->id, "%s: got %s", u->id, e);
3395
3396 t = strdup(e+7);
3397 if (!t) {
3398 log_oom();
3399 return;
3400 }
3401
3402 } else
3403 t = NULL;
3404
3405 if (!streq_ptr(s->status_text, t)) {
3406 free(s->status_text);
3407 s->status_text = t;
3408 notify_dbus = true;
3409 } else
3410 free(t);
3411 }
3412
3413 /* Interpet WATCHDOG= */
3414 if (strv_find(tags, "WATCHDOG=1")) {
3415 log_debug_unit(u->id, "%s: got WATCHDOG=1", u->id);
3416 service_reset_watchdog(s);
3417 }
3418
3419 /* Notify clients about changed status or main pid */
3420 if (notify_dbus)
3421 unit_add_to_dbus_queue(u);
3422 }
3423
3424 static int service_get_timeout(Unit *u, uint64_t *timeout) {
3425 Service *s = SERVICE(u);
3426 int r;
3427
3428 if (!s->timer_event_source)
3429 return 0;
3430
3431 r = sd_event_source_get_time(s->timer_event_source, timeout);
3432 if (r < 0)
3433 return r;
3434
3435 return 1;
3436 }
3437
3438 #ifdef HAVE_SYSV_COMPAT
3439
3440 static int service_enumerate(Manager *m) {
3441 char **p;
3442 unsigned i;
3443 _cleanup_closedir_ DIR *d = NULL;
3444 _cleanup_free_ char *path = NULL, *fpath = NULL, *name = NULL;
3445 Set *runlevel_services[ELEMENTSOF(rcnd_table)] = {};
3446 _cleanup_set_free_ Set *shutdown_services = NULL;
3447 Unit *service;
3448 Iterator j;
3449 int r;
3450
3451 assert(m);
3452
3453 if (m->running_as != SYSTEMD_SYSTEM)
3454 return 0;
3455
3456 STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
3457 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
3458 struct dirent *de;
3459
3460 free(path);
3461 path = strjoin(*p, "/", rcnd_table[i].path, NULL);
3462 if (!path) {
3463 r = -ENOMEM;
3464 goto finish;
3465 }
3466
3467 if (d)
3468 closedir(d);
3469
3470 d = opendir(path);
3471 if (!d) {
3472 if (errno != ENOENT)
3473 log_warning("opendir(%s) failed: %m", path);
3474
3475 continue;
3476 }
3477
3478 while ((de = readdir(d))) {
3479 int a, b;
3480
3481 if (ignore_file(de->d_name))
3482 continue;
3483
3484 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
3485 continue;
3486
3487 if (strlen(de->d_name) < 4)
3488 continue;
3489
3490 a = undecchar(de->d_name[1]);
3491 b = undecchar(de->d_name[2]);
3492
3493 if (a < 0 || b < 0)
3494 continue;
3495
3496 free(fpath);
3497 fpath = strjoin(path, "/", de->d_name, NULL);
3498 if (!fpath) {
3499 r = -ENOMEM;
3500 goto finish;
3501 }
3502
3503 if (access(fpath, X_OK) < 0) {
3504
3505 if (errno != ENOENT)
3506 log_warning("access() failed on %s: %m", fpath);
3507
3508 continue;
3509 }
3510
3511 free(name);
3512 name = sysv_translate_name(de->d_name + 3);
3513 if (!name) {
3514 r = log_oom();
3515 goto finish;
3516 }
3517
3518 r = manager_load_unit_prepare(m, name, NULL, NULL, &service);
3519 if (r < 0) {
3520 log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
3521 continue;
3522 }
3523
3524 if (de->d_name[0] == 'S') {
3525
3526 if (rcnd_table[i].type == RUNLEVEL_UP) {
3527 SERVICE(service)->sysv_start_priority_from_rcnd =
3528 MAX(a*10 + b, SERVICE(service)->sysv_start_priority_from_rcnd);
3529
3530 SERVICE(service)->sysv_enabled = true;
3531 }
3532
3533 r = set_ensure_allocated(&runlevel_services[i],
3534 trivial_hash_func, trivial_compare_func);
3535 if (r < 0)
3536 goto finish;
3537
3538 r = set_put(runlevel_services[i], service);
3539 if (r < 0)
3540 goto finish;
3541
3542 } else if (de->d_name[0] == 'K' &&
3543 (rcnd_table[i].type == RUNLEVEL_DOWN)) {
3544
3545 r = set_ensure_allocated(&shutdown_services,
3546 trivial_hash_func, trivial_compare_func);
3547 if (r < 0)
3548 goto finish;
3549
3550 r = set_put(shutdown_services, service);
3551 if (r < 0)
3552 goto finish;
3553 }
3554 }
3555 }
3556
3557 /* Now we loaded all stubs and are aware of the lowest
3558 start-up priority for all services, not let's actually load
3559 the services, this will also tell us which services are
3560 actually native now */
3561 manager_dispatch_load_queue(m);
3562
3563 /* If this is a native service, rely on native ways to pull in
3564 * a service, don't pull it in via sysv rcN.d links. */
3565 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
3566 SET_FOREACH(service, runlevel_services[i], j) {
3567 service = unit_follow_merge(service);
3568
3569 if (service->fragment_path)
3570 continue;
3571
3572 r = unit_add_two_dependencies_by_name_inverse(
3573 service, UNIT_AFTER, UNIT_WANTS,
3574 rcnd_table[i].target, NULL, true);
3575 if (r < 0)
3576 goto finish;
3577 }
3578
3579 /* We honour K links only for halt/reboot. For the normal
3580 * runlevels we assume the stop jobs will be implicitly added
3581 * by the core logic. Also, we don't really distinguish here
3582 * between the runlevels 0 and 6 and just add them to the
3583 * special shutdown target. */
3584 SET_FOREACH(service, shutdown_services, j) {
3585 service = unit_follow_merge(service);
3586
3587 if (service->fragment_path)
3588 continue;
3589
3590 r = unit_add_two_dependencies_by_name(
3591 service, UNIT_BEFORE, UNIT_CONFLICTS,
3592 SPECIAL_SHUTDOWN_TARGET, NULL, true);
3593 if (r < 0)
3594 goto finish;
3595 }
3596
3597 r = 0;
3598
3599 finish:
3600
3601 for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
3602 set_free(runlevel_services[i]);
3603
3604 return r;
3605 }
3606 #endif
3607
3608 static void service_bus_name_owner_change(
3609 Unit *u,
3610 const char *name,
3611 const char *old_owner,
3612 const char *new_owner) {
3613
3614 Service *s = SERVICE(u);
3615 int r;
3616
3617 assert(s);
3618 assert(name);
3619
3620 assert(streq(s->bus_name, name));
3621 assert(old_owner || new_owner);
3622
3623 if (old_owner && new_owner)
3624 log_debug_unit(u->id,
3625 "%s's D-Bus name %s changed owner from %s to %s",
3626 u->id, name, old_owner, new_owner);
3627 else if (old_owner)
3628 log_debug_unit(u->id,
3629 "%s's D-Bus name %s no longer registered by %s",
3630 u->id, name, old_owner);
3631 else
3632 log_debug_unit(u->id,
3633 "%s's D-Bus name %s now registered by %s",
3634 u->id, name, new_owner);
3635
3636 s->bus_name_good = !!new_owner;
3637
3638 if (s->type == SERVICE_DBUS) {
3639
3640 /* service_enter_running() will figure out what to
3641 * do */
3642 if (s->state == SERVICE_RUNNING)
3643 service_enter_running(s, SERVICE_SUCCESS);
3644 else if (s->state == SERVICE_START && new_owner)
3645 service_enter_start_post(s);
3646
3647 } else if (new_owner &&
3648 s->main_pid <= 0 &&
3649 (s->state == SERVICE_START ||
3650 s->state == SERVICE_START_POST ||
3651 s->state == SERVICE_RUNNING ||
3652 s->state == SERVICE_RELOAD)) {
3653
3654 _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
3655 pid_t pid;
3656
3657 /* Try to acquire PID from bus service */
3658
3659 r = sd_bus_get_owner(u->manager->api_bus, name, SD_BUS_CREDS_PID, &creds);
3660 if (r >= 0)
3661 r = sd_bus_creds_get_pid(creds, &pid);
3662 if (r >= 0) {
3663 log_debug_unit(u->id, "%s's D-Bus name %s is now owned by process %u", u->id, name, (unsigned) pid);
3664
3665 service_set_main_pid(s, pid);
3666 unit_watch_pid(UNIT(s), pid);
3667 }
3668 }
3669 }
3670
3671 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
3672 _cleanup_free_ char *peer = NULL;
3673 int r;
3674
3675 assert(s);
3676 assert(fd >= 0);
3677
3678 /* This is called by the socket code when instantiating a new
3679 * service for a stream socket and the socket needs to be
3680 * configured. */
3681
3682 if (UNIT(s)->load_state != UNIT_LOADED)
3683 return -EINVAL;
3684
3685 if (s->socket_fd >= 0)
3686 return -EBUSY;
3687
3688 if (s->state != SERVICE_DEAD)
3689 return -EAGAIN;
3690
3691 if (getpeername_pretty(fd, &peer) >= 0) {
3692
3693 if (UNIT(s)->description) {
3694 _cleanup_free_ char *a;
3695
3696 a = strjoin(UNIT(s)->description, " (", peer, ")", NULL);
3697 if (!a)
3698 return -ENOMEM;
3699
3700 r = unit_set_description(UNIT(s), a);
3701 } else
3702 r = unit_set_description(UNIT(s), peer);
3703
3704 if (r < 0)
3705 return r;
3706 }
3707
3708 s->socket_fd = fd;
3709
3710 unit_ref_set(&s->accept_socket, UNIT(sock));
3711
3712 return unit_add_two_dependencies(UNIT(sock), UNIT_BEFORE, UNIT_TRIGGERS, UNIT(s), false);
3713 }
3714
3715 static void service_reset_failed(Unit *u) {
3716 Service *s = SERVICE(u);
3717
3718 assert(s);
3719
3720 if (s->state == SERVICE_FAILED)
3721 service_set_state(s, SERVICE_DEAD);
3722
3723 s->result = SERVICE_SUCCESS;
3724 s->reload_result = SERVICE_SUCCESS;
3725
3726 RATELIMIT_RESET(s->start_limit);
3727 }
3728
3729 static int service_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) {
3730 Service *s = SERVICE(u);
3731
3732 return unit_kill_common(u, who, signo, s->main_pid, s->control_pid, error);
3733 }
3734
3735 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
3736 [SERVICE_DEAD] = "dead",
3737 [SERVICE_START_PRE] = "start-pre",
3738 [SERVICE_START] = "start",
3739 [SERVICE_START_POST] = "start-post",
3740 [SERVICE_RUNNING] = "running",
3741 [SERVICE_EXITED] = "exited",
3742 [SERVICE_RELOAD] = "reload",
3743 [SERVICE_STOP] = "stop",
3744 [SERVICE_STOP_SIGTERM] = "stop-sigterm",
3745 [SERVICE_STOP_SIGKILL] = "stop-sigkill",
3746 [SERVICE_STOP_POST] = "stop-post",
3747 [SERVICE_FINAL_SIGTERM] = "final-sigterm",
3748 [SERVICE_FINAL_SIGKILL] = "final-sigkill",
3749 [SERVICE_FAILED] = "failed",
3750 [SERVICE_AUTO_RESTART] = "auto-restart",
3751 };
3752
3753 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
3754
3755 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3756 [SERVICE_RESTART_NO] = "no",
3757 [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3758 [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3759 [SERVICE_RESTART_ON_WATCHDOG] = "on-watchdog",
3760 [SERVICE_RESTART_ON_ABORT] = "on-abort",
3761 [SERVICE_RESTART_ALWAYS] = "always"
3762 };
3763
3764 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3765
3766 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3767 [SERVICE_SIMPLE] = "simple",
3768 [SERVICE_FORKING] = "forking",
3769 [SERVICE_ONESHOT] = "oneshot",
3770 [SERVICE_DBUS] = "dbus",
3771 [SERVICE_NOTIFY] = "notify",
3772 [SERVICE_IDLE] = "idle"
3773 };
3774
3775 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3776
3777 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3778 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3779 [SERVICE_EXEC_START] = "ExecStart",
3780 [SERVICE_EXEC_START_POST] = "ExecStartPost",
3781 [SERVICE_EXEC_RELOAD] = "ExecReload",
3782 [SERVICE_EXEC_STOP] = "ExecStop",
3783 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3784 };
3785
3786 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3787
3788 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3789 [NOTIFY_NONE] = "none",
3790 [NOTIFY_MAIN] = "main",
3791 [NOTIFY_ALL] = "all"
3792 };
3793
3794 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3795
3796 static const char* const service_result_table[_SERVICE_RESULT_MAX] = {
3797 [SERVICE_SUCCESS] = "success",
3798 [SERVICE_FAILURE_RESOURCES] = "resources",
3799 [SERVICE_FAILURE_TIMEOUT] = "timeout",
3800 [SERVICE_FAILURE_EXIT_CODE] = "exit-code",
3801 [SERVICE_FAILURE_SIGNAL] = "signal",
3802 [SERVICE_FAILURE_CORE_DUMP] = "core-dump",
3803 [SERVICE_FAILURE_WATCHDOG] = "watchdog",
3804 [SERVICE_FAILURE_START_LIMIT] = "start-limit"
3805 };
3806
3807 DEFINE_STRING_TABLE_LOOKUP(service_result, ServiceResult);
3808
3809 static const char* const start_limit_action_table[_SERVICE_START_LIMIT_MAX] = {
3810 [SERVICE_START_LIMIT_NONE] = "none",
3811 [SERVICE_START_LIMIT_REBOOT] = "reboot",
3812 [SERVICE_START_LIMIT_REBOOT_FORCE] = "reboot-force",
3813 [SERVICE_START_LIMIT_REBOOT_IMMEDIATE] = "reboot-immediate"
3814 };
3815 DEFINE_STRING_TABLE_LOOKUP(start_limit_action, StartLimitAction);
3816
3817 const UnitVTable service_vtable = {
3818 .object_size = sizeof(Service),
3819 .exec_context_offset = offsetof(Service, exec_context),
3820 .cgroup_context_offset = offsetof(Service, cgroup_context),
3821 .kill_context_offset = offsetof(Service, kill_context),
3822 .exec_runtime_offset = offsetof(Service, exec_runtime),
3823
3824 .sections =
3825 "Unit\0"
3826 "Service\0"
3827 "Install\0",
3828 .private_section = "Service",
3829
3830 .init = service_init,
3831 .done = service_done,
3832 .load = service_load,
3833
3834 .coldplug = service_coldplug,
3835
3836 .dump = service_dump,
3837
3838 .start = service_start,
3839 .stop = service_stop,
3840 .reload = service_reload,
3841
3842 .can_reload = service_can_reload,
3843
3844 .kill = service_kill,
3845
3846 .serialize = service_serialize,
3847 .deserialize_item = service_deserialize_item,
3848
3849 .active_state = service_active_state,
3850 .sub_state_to_string = service_sub_state_to_string,
3851
3852 .check_gc = service_check_gc,
3853 .check_snapshot = service_check_snapshot,
3854
3855 .sigchld_event = service_sigchld_event,
3856
3857 .reset_failed = service_reset_failed,
3858
3859 .notify_cgroup_empty = service_notify_cgroup_empty_event,
3860 .notify_message = service_notify_message,
3861
3862 .bus_name_owner_change = service_bus_name_owner_change,
3863
3864 .bus_interface = "org.freedesktop.systemd1.Service",
3865 .bus_vtable = bus_service_vtable,
3866 .bus_set_property = bus_service_set_property,
3867 .bus_commit_properties = bus_service_commit_properties,
3868
3869 .get_timeout = service_get_timeout,
3870
3871 #ifdef HAVE_SYSV_COMPAT
3872 .enumerate = service_enumerate,
3873 #endif
3874
3875 .can_transient = true,
3876
3877 .status_message_formats = {
3878 .starting_stopping = {
3879 [0] = "Starting %s...",
3880 [1] = "Stopping %s...",
3881 },
3882 .finished_start_job = {
3883 [JOB_DONE] = "Started %s.",
3884 [JOB_FAILED] = "Failed to start %s.",
3885 [JOB_DEPENDENCY] = "Dependency failed for %s.",
3886 [JOB_TIMEOUT] = "Timed out starting %s.",
3887 },
3888 .finished_stop_job = {
3889 [JOB_DONE] = "Stopped %s.",
3890 [JOB_FAILED] = "Stopped (with error) %s.",
3891 [JOB_TIMEOUT] = "Timed out stopping %s.",
3892 },
3893 },
3894 };
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